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    UNITED STATES v. PELTIER, 422 U.S. 531 (1975)

    U.S. Supreme Court

    UNITED STATES v. PELTIER, 422 U.S. 531 (1975)

    422 U.S. 531

    UNITED STATES v. PELTIER.
    CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT.

    No. 73-2000.

    Argued February 18, 1975.
    Decided June 25, 1975.

    This Court's decision in Almeida-Sanchez v. United States, 413 U.S. 266 , which held that a warrantless automobile search, conducted about 25 air miles from the Mexican border by Border Patrol agents acting without probable cause, contravened the Fourth Amendment, does not apply to Border Patrol searches like the one in this case, which, though concededly unconstitutional under Almeida-Sanchez standards, was conducted prior to June 21, 1973, the date of that decision. The policies underlying the exclusionary rule do not require retroactive application of Almeida-Sanchez where, as here, the agents were acting in reliance upon a federal statute supported by longstanding administrative regulations and continuous judicial approval. Pp. 535-542.

    500 F.2d 985, reversed.

    REHNQUIST, J., delivered the opinion of the Court, in which BURGER, C. J., and WHITE, BLACKMUN, and POWELL, JJ., joined. DOUGLAS, J., filed a dissenting opinion, post, p. 543. BRENNAN, J., filed a dissenting opinion, in which MARSHALL, J., joined, and in Part I of which STEWART, J., joined, post, p. 544. STEWART, J., filed a dissenting statement, post, p. 543.

    William L. Patton argued the cause for the United States. On the brief were Solicitor General Bork, Acting Assistant Attorney General Keeney, Mark L. Evans, and Peter M. Shannon, Jr.

    Sandor W. Shapery, by appointment of the Court, 419 U.S. 1044 , argued the cause and filed a brief for respondent. *  

    [ Footnote * ] Sanford Jay Rosen filed a brief for the Mexican American Legal Defense and Educational Fund as amicus curiae urging affirmance. [422 U.S. 531, 532]  

    MR. JUSTICE REHNQUIST delivered the opinion of the Court.

    Four months before this Court's decision in Almeida-Sanchez v. United States, 413 U.S. 266 (1973), respondent was stopped in his automobile by a roving border patrol, and three plastic garbage bags containing 270 pounds of marihuana were found in the trunk of his car by Border Patrol agents. On the basis of this evidence an indictment was returned charging him with a violation of 84 Stat. 1260, 21 U.S.C. 841 (a) (1). When respondent's motion to suppress the evidence was denied after a hearing, he stipulated in writing that he "did knowingly and intentionally possess, with intent to distribute, the marijuana concealed in the 1962 Chevrolet which he was driving on February 28, 1973." 1 The District Court found respondent guilty and imposed sentence. On appeal from that judgment, the Court of Appeals for the Ninth Circuit, sitting en banc, reversed the judgment on the ground that the "rule announced by the Supreme Court in Almeida-Sanchez v. United States . . . should be applied to similar cases pending on appeal on the date the Supreme Court's decision was announced." 500 F.2d 985, 986 (1974) (footnote omitted). 2 We granted the Government's petition for certiorari. 419 U.S. 993 (1974).

    In Almeida-Sanchez, supra, this Court held that a warrantless automobile search, conducted approximately 25 air miles from the Mexican border by Border Patrol agents, acting without probable cause, was unconstitutional [422 U.S. 531, 533]   under the Fourth Amendment. 3 In this case the Government conceded in the Court of Appeals that the search of respondent's automobile approximately 70 air miles from the Mexican border and the seizure of the marihuana were unconstitutional under the standard announced in Almeida-Sanchez, but it contended that that standard should not be applied to searches conducted prior to June 21, 1973, the date of the decision in Almeida-Sanchez. In an inquiry preliminary to balancing the interests for and against retroactive application, see Stovall v. Denno, 388 U.S. 293, 297 (1967), the majority of the Court of Appeals first considered whether this Court had "articulated a new doctrine" in Almeida-Sanchez, 500 F.2d, at 987. See, e. g., Chevron Oil Co. v. Huson, 404 U.S. 97, 106 (1971); Milton v. Wainwright, 407 U.S. 371, 381 -382, n. 2 (1972) (STEWART, J., dissenting). Concluding that Almeida-Sanchez overruled no prior decision of this Court and instead "reaffirmed well-established Fourth Amendment standards" that did not "disturb a long-accepted and relied-upon practice," 500 F.2d, at 988, the Court of Appeals held:

      "[Respondent] is entitled to the benefit of the rule announced in Almeida-Sanchez, not because of retroactivity but because of Fourth Amendment principles never deviated from by the Supreme Court." Id., at 989.

    The judgment of conviction was reversed, and the case [422 U.S. 531, 534]   was remanded to the District Court to suppress the evidence seized from respondent's automobile.

    Although expressing some doubt about the applicability of the old law-new law test as a precondition to retroactivity analysis, id., at 990, the six dissenters joined issue with the majority over the proper interpretation of Almeida-Sanchez. The dissenters concluded that Almeida-Sanchez had announced a new constitutional rule because the decision overruled a consistent line of Courts of Appeals precedent and disrupted a long accepted and widely relied upon administrative practice. Border Patrol agents had conducted roving searches pursuant to congressional authorization, 66 Stat. 233, 8 U.S.C. 1357 (a) (3), and administrative regulation, 8 CFR 287.1 (a) (2) (1973), which had been continuously upheld until this Court's decision in Almeida-Sanchez. Since Almeida-Sanchez stated a new rule, the dissenters concluded that the applicability of that decision to pre-June 21, 1973, roving patrol vehicle searches should be determined by reference to the standards summarized in Stovall v. Denno, supra. 4 For the reasons expressed in Part II of Judge Wallace's opinion in United States v. Bowen, 500 F.2d 960, 975-981 (CA9), cert. granted, 419 U.S. 824 (1974), the dissenters concluded that Almeida-Sanchez should be accorded prospective application.

    Despite the conceded illegality of the search under the Almeida-Sanchez standard, the Government contends that the exclusionary rule should not be mechanically applied in the case now before us because the policies [422 U.S. 531, 535]   underlying the rule do not justify its retroactive application to pre-Almeida-Sanchez searches. We agree.

    I

    Since 1965 this Court has repeatedly struggled with the question of whether rulings in criminal cases should be given retroactive effect. In those cases "[w]here the major purpose of new constitutional doctrine is to overcome an aspect of the criminal trial that substantially impairs its truth-finding function and so raises serious questions about the accuracy of guilty verdicts in past trials," Williams v. United States, 401 U.S. 646, 653 (1971), the doctrine has quite often been applied retroactively. It is indisputable, however, that in every case in which the Court has addressed the retroactivity problem in the context of the exclusionary rule, whereby concededly relevant evidence is excluded in order to enforce a constitutional guarantee that does not relate to the integrity of the factfinding process, the Court has concluded that any such new constitutional principle would be accorded only prospective application. 5 Linkletter v. Walker, 381 U.S. 618 (1965); Johnson v. New Jersey, 384 U.S. 719 (1966); Stovall v. Denno, supra; Fuller v. Alaska, 393 U.S. 80 (1968); Desist v. United States, 394 U.S. 244 (1969); Jenkins v. Delaware, 395 U.S. 213   [422 U.S. 531, 536]   (1969); Williams v. United States, supra; Hill v. California, 401 U.S. 797 (1971).

    We think that these cases tell us a great deal about the nature of the exclusionary rule, as well as something about the nature of retroactivity analysis. Decisions of this Court applying the exclusionary rule to unconstitutionally seized evidence have referred to "the imperative of judicial integrity," Elkins v. United States, 364 U.S. 206, 222 (1960), although the Court has relied principally upon the deterrent purpose served by the exclusionary rule. See Mapp v. Ohio, 367 U.S. 643 (1961); Lee v. Florida, 392 U.S. 378 (1968); see also United States v. Calandra, 414 U.S. 338 (1974); Michigan v. Tucker, 417 U.S. 433 (1974). And see also Oaks, Studying the Exclusionary Rule in Search and Seizure, 37 U. Chi. L. Rev. 665, 668-672 (1970).

    When it came time to consider whether those decisions would be applied retroactively, however, the Court recognized that the introduction of evidence which had been seized by law enforcement officials in good-faith compliance with then-prevailing constitutional norms did not make the courts "accomplices in the willful disobedience of a Constitution they are sworn to uphold." Elkins v. United States, supra, at 223. Thus, while the "imperative of judicial integrity" played a role in this Court's decision to overrule Wolf v. Colorado, 338 U.S. 25 (1949), see Mapp v. Ohio, supra, at 659, the Mapp decision was not applied retroactively: "Rather than being abhorrent at the time of seizure in this case, the use in state trials of illegally seized evidence had been specifically authorized by this Court in Wolf." Linkletter v. Walker, supra, at 638 (footnote omitted). Similarly, in Lee v. Florida, supra, this Court overruled Schwartz v. Texas, 344 U.S. 199 (1952), and held that evidence seized in violation of 605 of the Federal Communications [422 U.S. 531, 537]   Act of 1934, 48 Stat. 1103, 47 U.S.C. 605, by state officers could not be introduced into evidence at state criminal trials:

      "[T]he decision we reach today is not based upon language and doctrinal symmetry alone. It is buttressed as well by the `imperative of judicial integrity.' Elkins v. United States, 364 U.S. 206, 222 . Under our Constitution no court, state or federal, may serve as an accomplice in the willful transgression of `the Laws of the United States,' laws by which `the Judges in every State [are] bound . . . .'" 392 U.S., at 385 -386 (footnotes omitted).

    But when it came time to consider the retroactivity of Lee, the Court held that it would not be applied retroactively, saying:

      "Retroactive application of Lee would overturn every state conviction obtained in good-faith reliance on Schwartz. Since this result is not required by the principle upon which Lee was decided, or necessary to accomplish its purpose, we hold that the exclusionary rule is to be applied only to trials in which the evidence is sought to be introduced after the date of our decision in Lee." Fuller v. Alaska, supra, at 81.

    The teaching of these retroactivity cases is that if the law enforcement officers reasonably believed in good faith that evidence they had seized was admissible at trial, the "imperative of judicial integrity" is not offended by the introduction into evidence of that material even if decisions subsequent to the search or seizure have broadened the exclusionary rule to encompass evidence seized in that manner. It would seem to follow a fortiori from the Linkletter and Fuller holdings that the "imperative [422 U.S. 531, 538]   of judicial integrity" is also not offended if law enforcement officials reasonably believed in good faith that their conduct was in accordance with the law even if decisions subsequent to the search or seizure have held that conduct of the type engaged in by the law enforcement officials is not permitted by the Constitution. For, although the police in Linkletter and Fuller could not have been expected to foresee the application of the exclusionary rule to state criminal trials, they could reasonably have entertained no similar doubts as to the illegality of their conduct. See Wolf v. Colorado, 338 U.S., at 27 ; 605 of the Federal Communications Act of 1934; cf. Nardone v. United States, 302 U.S. 379 (1937).

    This approach to the "imperative of judicial integrity" does not differ markedly from the analysis the Court has utilized in determining whether the deterrence rationale undergirding the exclusionary rule would be furthered by retroactive application of new constitutional doctrines. See Linkletter v. Walker, supra, at 636-637; Fuller v. Alaska, supra, at 81; Desist v. United States, supra, at 249-251. In Desist, the Court explicitly recognized the interrelation between retroactivity rulings and the exclusionary rule: "[W]e simply decline to extend the court-made exclusionary rule to cases in which its deterrent purpose would not be served." 394 U.S., at 254 n. 24.

    This focus in the retroactivity cases on the purposes served by the exclusionary rule is also quite in harmony with the approach taken generally to the exclusionary rule. In United States v. Calandra, 414 U.S., at 348 , we said that the exclusionary rule "is a judicially created remedy designed to safeguard Fourth Amendment rights generally through its deterrent effect, rather than a personal constitutional right of the party aggrieved." It follows that "the application of the rule has been restricted [422 U.S. 531, 539]   to those areas where its remedial objectives are thought most efficaciously served." Ibid. We likewise observed in Michigan v. Tucker, 417 U.S., at 447 :

      "The deterrent purpose of the exclusionary rule necessarily assumes that the police have engaged in willful, or at the very least negligent, conduct which has deprived the defendant of some right. By refusing to admit evidence gained as a result of such conduct, the courts hope to instill in those particular investigating officers, or in their future counterparts, a greater degree of care toward the rights of an accused. Where the official action was pursued in complete good faith, however, the deterrence rationale loses much of its force."

    The "reliability and relevancy," Linkletter, supra, at 639, of the evidence found in the trunk of respondent's car is unquestioned. It was sufficiently damning on the issue of respondent's guilt or innocence that he stipulated in writing that in effect he had committed the offense charged. Whether or not the exclusionary rule should be applied to the roving Border Patrol search conducted in this case, then, depends on whether considerations of either judicial integrity or deterrence of Fourth Amendment violations are sufficiently weighty to require that the evidence obtained by the Border Patrol in this case be excluded.

    II

    The Border Patrol agents who stopped and searched respondent's automobile were acting pursuant to 287 (a) (3) of the Immigration and Nationality Act of 1952, 66 Stat. 233, 8 U.S.C. 1357 (a) (3). 6 That provision, [422 U.S. 531, 540]   which carried forward statutory authorization dating back to 1946, 60 Stat. 865, 8 U.S.C. 110 (1946 ed.), 7 authorizes appropriately designated Immigration and Naturalization officers to search vehicles "within a reasonable distance from any external boundary of the United States" without a warrant. Pursuant to this statutory authorization, regulations were promulgated fixing the "reasonable distance," as specified in 287 (a) (3), at "100 air miles from any external boundary of the United States," 22 Fed. Reg. 9808 (1957), as amended, 29 Fed. Reg. 13244 (1964), 8 CFR 287.1 (a) (2) (1973).

    Between 1952 and Almeida-Sanchez, roving Border Patrol searches under 287 (a) (3) were upheld repeatedly against constitutional attack. 8 Dicta in many [422 U.S. 531, 541]   other Fifth, 9 Ninth, 10 and Tenth Circuit 11 decisions strongly suggested that the statute and the Border Patrol policy were acceptable means for policing the immigration laws. As MR. JUSTICE POWELL observed in his concurring opinion in Almeida-Sanchez:

      "Roving automobile searches in border regions for aliens . . . have been consistently approved by the judiciary. While the question is one of first impression in this Court, such searches uniformly have been sustained by the courts of appeals whose jurisdictions include those areas of the border between Mexico and the United States where the problem has been most severe." 413 U.S., at 278 .

    It was in reliance upon a validly enacted statute, supported by longstanding administrative regulations and continuous judicial approval, that Border Patrol agents stopped and searched respondent's automobile. Since the parties acknowledge that Almeida-Sanchez was the first roving Border Patrol case to be decided by this [422 U.S. 531, 542]   Court, unless we are to hold that parties may not reasonably rely upon any legal pronouncement emanating from sources other than this Court, we cannot regard as blameworthy those parties who conform their conduct to the prevailing statutory or constitutional norm. 12 Cf. Chevron Oil Co. v. Huson, 404 U.S. 97 (1971); Lemon v. Kurtzman, 411 U.S. 192 (1973). If the purpose of the exclusionary rule is to deter unlawful police conduct then evidence obtained from a search should be suppressed only if it can be said that the law enforcement officer had knowledge, or may properly be charged with knowledge, that the search was unconstitutional under the Fourth Amendment. Admittedly this uniform treatment of roving border patrol searches by the federal judiciary was overturned by this Court's decision in Almeida-Sanchez. But in light of this history and of what we perceive to be the purpose of the exclusionary rule, we conclude that nothing in the Fourth Amendment, or in the exclusionary rule fashioned to implement it, requires that the evidence here be suppressed, even if we assume that respondent's Fourth Amendment rights were violated by the search of his car. 13  

    The judgment of the Court of Appeals is therefore

    MR. JUSTICE STEWART dissents from the opinion and judgment of the Court for the reasons set out in Part I of the dissenting opinion of MR. JUSTICE BRENNAN, post, at 544-549.

    Footnotes

    [ Footnote 1 ] App. 28. The stipulation provided that it "would not [have been] entered into had the [respondent's] motion to suppress in the case been granted." Ibid.

    [ Footnote 2 ] The Fifth Circuit had reached a contrary conclusion in United States v. Miller, 492 F.2d 37 (1974).

    [ Footnote 3 ] The Court acknowledged the "power of the Federal Government to exclude aliens from the country" and the constitutionality of "routine inspections and searches of individuals or conveyances seeking to cross our borders." 413 U.S., at 272 . While searches of this sort could be conducted "not only at the border itself, but at its functional equivalents as well," ibid., the Court concluded that the search at issue in the case "was of a wholly different sort." Id., at 273.

    [ Footnote 4 ] 388 U.S., at 297 : "The criteria guiding resolution of the question [of retroactivity] implicate (a) the purpose to be served by the new standards, (b) the extent of the reliance by law enforcement authorities on the old standards, and (c) the effect on the administration of justice of a retroactive application of the new standards."

    [ Footnote 5 ] By the time Linkletter v. Walker, 381 U.S. 618 (1965), was decided, Mapp v. Ohio, 367 U.S. 643 (1961), had already been applied to three cases pending on direct review at the time Mapp was decided. Ker v. California, 374 U.S. 23 (1963); Fahy v. Connecticut, 375 U.S. 85 (1963); Stoner v. California, 376 U.S. 483 (1964). Those cases were decided without discussion of retroactivity principles, and they have not been interpreted as establishing any retroactivity limitation of general applicability. See Linkletter, supra, at 622; Johnson v. New Jersey, 384 U.S. 719, 732 (1966); Desist v. United States, 394 U.S. 244, 252 -253 (1969).

    [ Footnote 6 ] Title 8 U.S.C. 1357 (a) (3):

      "Any officer or employee of the Service authorized under regulations [422 U.S. 531, 540]   prescribed by the Attorney General shall have power without warrant -

        . . . . .

      "within a reasonable distance from any external boundary of the United States, to board and search for aliens any vessel within the territorial waters of the United States and any railway car, aircraft, conveyance, or vehicle, and within a distance of twenty-five miles from any such external boundary to have access to private lands, but not dwellings, for the purpose of patrolling the border to prevent the illegal entry of aliens into the United States."

    [ Footnote 7 ] "Any employee of the Immigration and Naturalization Service authorized so to do under regulations prescribed by the Commissioner of Immigration and Naturalization with the approval of the Attorney General, shall have power without warrant . . . to board and search for aliens any vessel within the territorial waters of the United States, railway car, aircraft, conveyance, or vehicle, within a reasonable distance from any external boundary of the United States."

    [ Footnote 8 ] United States v. Thompson, 475 F.2d 1359 (CA5 1973); Kelly v. United States, 197 F.2d 162 (CA5 1952); Roa-Rodriquez v. United States, 410 F.2d 1206 (CA10 1969); United States v. Miranda, 426 F.2d 283 (CA9 1970); United States v. Almeida-Sanchez, 452 F.2d 459 (CA9 1971), rev'd, 413 U.S. 266 (1973). In support of these holdings, the Courts of Appeals have relied upon cases sustaining searches and seizures at fixed checkpoints maintained [422 U.S. 531, 541]   within 100 air miles of the border. See nn. 9, 10, and 11, infra. Whether fixed-checkpoint searches and seizures are constitutional notwithstanding our decision in Almeida-Sanchez is before us in United States v. Ortiz, No. 73-2050, cert. granted, 419 U.S. 824 (1974); United States v. Bowen, 500 F.2d 960 (CA9), cert. granted, 419 U.S. 824 (1974).

    [ Footnote 9 ] Haerr v. United States, 240 F.2d 533 (1957); Ramirez v. United States, 263 F.2d 385 (1959); United States v. De Leon, 462 F.2d 170 (1972), cert. denied, 414 U.S. 853 (1973).

    [ Footnote 10 ] Fernandez v. United States, 321 F.2d 283 (1963); Barba-Reyes v. United States, 387 F.2d 91 (1967); United States v. Avey, 428 F.2d 1159, cert. denied, 400 U.S. 903 (1970); Fumagalli v. United States, 429 F.2d 1011 (1970); Mienke v. United States, 452 F.2d 1076 (1971); United States v. Foerster, 455 F.2d 981 (1972), vacated and remanded, 413 U.S. 915 (1973).

    [ Footnote 11 ] United States v. McCormick, 468 F.2d 68 (1972), cert. denied, 410 U.S. 927 (1973); United States v. Anderson, 468 F.2d 1280 (1972).

    [ Footnote 12 ] MR. JUSTICE BRENNAN'S dissent also suggests that we were wrong to reverse the judgment affirming Almeida-Sanchez' conviction if we uphold the judgment of conviction against Peltier. But where it has been determined, as in a case such as Linkletter, that an earlier holding such as Mapp is not to be applied retroactively, it has not been questioned that Mapp was entitled to the benefit of the rule enunciated in her case. See Stovall v. Denno, 388 U.S., at 300 -301. Nor did the Government in Almeida-Sanchez urge upon us any considerations of exclusionary rule policy independent of the merits of the Fourth Amendment question which we decided adversely to the Government.

    [ Footnote 13 ] In its haste to extrapolate today's decision, that dissent argues [422 U.S. 531, 543]   that this decision will both "stop dead in its tracks judicial development of Fourth Amendment rights" since "the first duty of a court will be to deny the accused's motion to suppress if he cannot cite a case invalidating a search or seizure on identical facts" and add "a new layer of fact finding in deciding motions to suppress in the already heavily burdened federal courts." Post, at 554, 560. Whether today's decision will reduce the responsibilities of district courts, as the dissent first suggests, or whether that burden will be increased, as the dissent also suggests, it surely will not fulfill both of these contradictory prophecies. A fact not open to doubt is that the district courts are presently required, in hearing motions to suppress evidence, to spend substantial time addressing issues that do not go to a criminal defendant's guilt or innocence. In this case, for example, the transcript of the suppression hearing takes almost three times as many pages in the Appendix as is taken by the transcript of respondent's trial. App. 5-36.

    MR. JUSTICE DOUGLAS, dissenting.

    I agree with my Brother BRENNAN that Almeida-Sanchez v. United States, 413 U.S. 266 (1973), reaffirmed traditional Fourth Amendment principles and that the purposes of the exclusionary rule compel exclusion of the unconstitutionally seized evidence in this case. I adhere to my view that a constitutional rule made retroactive in one case must be applied retroactively in all. See my dissent in Daniel v. Louisiana, 420 U.S. 31, 33 (1975), and cases cited. It is largely a matter of chance that we held the Border Patrol to the command of the Fourth Amendment in Almeida-Sanchez rather than in the case of this defendant. Equal justice does not permit a defendant's fate to depend upon such a fortuity. The judgment below should be affirmed. [422 U.S. 531, 544]  

    MR. JUSTICE BRENNAN, with whom MR. JUSTICE MARSHALL joins, dissenting.

    I

    Until today the question of the prospective application of a decision of this Court was not deemed to be presented unless the decision "constitute[d] a sharp break in the line of earlier authority or an avulsive change which caused the current of the law thereafter to flow between new banks." Hanover Shoe, Inc. v. United Shoe Machinery Corp., 392 U.S. 481, 499 (1968). 1 Measured by that test, our decision in Almeida-Sanchez v. United States, 413 U.S. 266 (1973), presents no question of prospectivity, and the Court errs in even addressing the question. For both the Court's opinion and the concurring opinion of MR. JUSTICE POWELL in Almeida-Sanchez plainly applied familiar principles of constitutional adjudication announced 50 years ago in Carroll v. United States, 267 U.S. 132, 153 -154 (1925), and merely construed 66 Stat. 233, 8 U.S.C. 1357 (a) (3), so as to render it constitutionally consistent with that decision. 413 U.S., at 272 ; id., at 275, and n. 1 (POWELL, J., concurring).

    The Court states, however, that the Border Patrol agents searched Peltier "in reliance upon a validly enacted statute, supported by longstanding administrative regulations and continuous judicial approval . . . ." Ante, [422 U.S. 531, 545]   at 541. With all respect, any such reliance would be misplaced. First, the Court repeats the error of my Brother WHITE in his dissent in Almeida-Sanchez in finding express congressional and administrative approval for random roving patrol searches. 413 U.S., at 291 , 292-293, 296. The statute, 8 U.S.C. 1357 (a), only authorizes searches of vehicles "without warrant . . . within a reasonable distance from any external boundary"; nothing in the statute expressly dispenses with the necessity for showing probable cause. The regulation, 8 CFR 287.1 (a) (2) (1973), merely defined "a reasonable distance" as "within 100 air miles"; it, too, does not purport to exempt the Border Patrol from observing the probable-cause requirement. 2  

    Second, the Court states that "[b]etween 1952 and Almeida-Sanchez, roving Border Patrol searches under 287 (a) (3) were upheld repeatedly against constitutional attack." Ante, at 540. But the first decision of the Court of Appeals for the Ninth Circuit squarely in point, United States v. Miranda, 426 F.2d 283, was decided in 1970, and the second, United States v. Almeida-Sanchez, [422 U.S. 531, 546]   452 F.2d 459, was decided over strong dissent in 1971 and was pending on certiorari in this Court when Peltier was searched. 406 U.S. 944 (1972). The first decision of the Court of Appeals for the Tenth Circuit approving alien searches by roving patrols without either probable cause or any suspicious conduct was in 1969. Roa-Rodriquez v. United States, 410 F.2d 1206. And the Court of Appeals for the Fifth Circuit, unlike the Ninth and Tenth Circuits, always required at least a "reasonable suspicion" that a car might contain aliens as the basis of a valid search under 8 U.S.C. 1357 (a) (3). United States v. Wright, 476 F.2d 1027, 1030, and n. 2 (1973), and cases cited.

    In addition, the rule of Miranda, supra, was a patent anomaly in the Courts of Appeals which sanctioned roving patrol searches without a showing even of suspicious circumstances. The Court of Appeals for the Ninth Circuit, for example, held consistently that probable cause must be shown to validate a search for contraband except in a border search or its functional equivalent, see, e. g., Cervantes v. United States, 263 F.2d 800, 803 (1959); Fumagalli v. United States, 429 F.2d 1011 (1970), 3 and this despite a statutory authorization to search for contraband at least as broad as 1357 (a) [422 U.S. 531, 547]   (3). See 14 Stat. 178, 19 U.S.C. 482. 4 Moreover, the Courts of Appeals require some measure of cause to suspect violation of law in interrogations and arrests authorized by other subsections of 8 U.S.C. 1357 (a). See Au Yi Lau v. INS, 144 U.S. App. D.C. 147, 445 F.2d 217 (1971); Yam Sang Kwai v. INS, 133 U.S. App. D.C. 369, 411 F.2d 683 (1969).

    Given this history, it becomes quite clear why the Court has found it necessary to discard the "sharp break" test to reach the prospectivity question in this case. For the approval by Courts of Appeals of this law enforcement practice was short-lived, less than unanimous, irreconcilable with other rulings of the same courts, and contrary to the explicit doctrine of this Court in Carroll, supra, as reaffirmed in Brinegar v. United States, 338 U.S. 160, 164 (1949), and other cases. If a case in this Court merely reaffirming longstanding precedent can ever constitute the "avulsive change [in] the current of the law" required before we even address the issue of prospectivity, Hanover Shoe, 392 U.S., at 499 , surely Almeida-Sanchez was not such a case. 5   [422 U.S. 531, 548]  

    This case is a good illustration of the dangers of addressing prospectivity where the "sharp break" standard is not met. As this Court has recognized, applying a decision only prospectively, 6 can entail inequity to others whose cases are here on direct review but are held pending decision of the case selected for decision. Stovall v. Denno, 388 U.S. 293, 301 (1967). Although I continue to believe that denial of the benefits of the decision in such cases is a tolerable anomaly in cases in which defendants [422 U.S. 531, 549]   were accorded all constitutional rights then announced by this Court, it becomes intolerable, and a travesty of justice, when the Court does no more than reaffirm and apply long-established constitutional principles to correct an aberration created by the courts of appeals.

    More fundamentally, applying a decision of this Court prospectively when the decision is not a "sharp break in the web of the law," Milton v. Wainwright, 407 U.S. 371, 381 n. 2 (1972) (STEWART, J., dissenting), encourages in those responsible for law enforcement a parsimonious approach to enforcement of constitutional rights. "One need not be a rigid partisan of Blackstone to recognize that many, though not all, of this Court's constitutional decisions are grounded upon fundamental principles whose content does not change dramatically from year to year . . . ." Desist v. United States, 394 U.S. 244, 263 (1969) (Harlan, J., dissenting). To apply our opinions prospectively except in "sharp break" cases "add[s] this Court's approval to those who honor the Constitution's mandate only where acceptable to them or compelled by the precise and inescapable specifics of a decision of this Court. . . . History does not embrace the years needed for us to hold, millimeter by millimeter, that such and such a penetration of individual rights is an infringement of the Constitution's guarantees. The vitality of our Constitution depends upon conceptual faithfulness and not merely decisional obedience. Certainly, this Court should not encourage police or other courts to disregard the plain purport of our decisions and to adopt a let's-wait-until-it's-decided approach." Id., at 277 (Fortas, J., dissenting). 7   [422 U.S. 531, 550]  

    II

    Nevertheless, the Court substitutes, at least as respects the availability of the exclusionary rule in cases involving searches invalid under the Fourth Amendment, a presumption against the availability of decisions of this Court except prospectively. The substitution discards not only the "sharp break" determinant but also the equally established principle that prospectivity "is not automatically determined by the provision of the Constitution on which the dictate is based. . . . [W]e must determine retroactivity `in each case' by looking to the peculiar traits of the specific `rule in question.'" Johnson v. New Jersey, 384 U.S. 719, 728 (1966). 8 Linkletter v. Walker, 381 U.S. 618 (1965), the seminal prospectivity decision, held only that "the Court may in the interest of justice make [a] rule prospective . . . where the exigencies of the situation require such an application." Id., at 628 (emphasis added). Today the Court stands the Linkletter holding on its head by creating a class of cases in which nonretroactivity is the rule and not, as heretofore, the exception.

    The Court's stated reason for this remarkable departure from settled principles is "the policies underlying the [exclusionary] rule." Ante, at 534-535. But the policies identified by the Court as underlying that rule in Fourth Amendment cases are distorted out of all resemblance to the understanding of purposes that has heretofore prevailed. I said in my dissent in United States v. Calandra, 414 U.S. 338 (1974), that that decision left [422 U.S. 531, 551]   me "with the uneasy feeling that . . . a majority of my colleagues have positioned themselves to . . . abandon altogether the exclusionary rule in search-and-seizure cases." Id., at 365. My uneasiness approaches conviction after today's treatment of the rule.

    III

    The Court's opinion depends upon an entirely new understanding of the exclusionary rule in Fourth Amendment cases, one which, if the vague contours outlined today are filled in as I fear they will be, forecasts the complete demise of the exclusionary rule as fashioned by this Court in over 61 years of Fourth Amendment jurisprudence. See Weeks v. United States, 232 U.S. 383 (1914). 9 An analysis of the Court's unsuccessfully veiled reformulation demonstrates that its apparent rush to discard 61 years of constitutional development has produced a formula difficult to comprehend and, on any understanding of its meaning, impossible to justify.

    The Court signals its new approach in these words: "If the purpose of the exclusionary rule is to deter unlawful police conduct, then evidence obtained from a search should be suppressed only if it can be said that the law enforcement officer had knowledge, or may properly be charged with knowledge, that the search was unconstitutional under the Fourth Amendment." Ante, at 542. True, the Court does not state in so many words that this formulation of the exclusionary rule is to be applied beyond the present retroactivity context. But the proposition is stated generally and, particularly in view of [422 U.S. 531, 552]   the concomitant expansion of prospectivity announced today, Part I, supra, I have no confidence that the new formulation is to be confined to putative retroactivity cases. Rather, I suspect that when a suitable opportunity arises, today's revision of the exclusionary rule will be pronounced applicable to all search-and-seizure cases. I therefore register my strong disagreement now.

    The new formulation obviously removes the very foundation of the exclusionary rule as it has been expressed in countless decisions. Until now the rule in federal criminal cases decided on direct review 10 has been that suppression is necessarily the sanction to be applied when it is determined that the evidence was in fact illegally acquired. 11 The revision unveiled today [422 U.S. 531, 553]   suggests that instead of that single inquiry, district judges may also have to probe the subjective knowledge of the official who orders the search, and the inferences from existing law that official should have drawn. 12 The decision whether or not to order suppression would then turn upon whether, based on that expanded inquiry, suppression would comport with either the deterrence rationale of the exclusionary rule or "the imperative of judicial integrity." 13   [422 U.S. 531, 554]  

    On this reasoning, Almeida-Sanchez itself was wrongly decided. For if the Border Patrolmen who searched Peltier could not have known that they were acting unconstitutionally, and thus could not have been deterred from the search by the possibility of the exclusion of the evidence from the trial, obviously the Border Patrolmen who searched Almeida-Sanchez several years earlier had no reason to be any more percipient. If application of the exclusionary rule depends upon a showing that the particular officials who conducted or authorized a particular search knew or should have known that they were violating a specific, established constitutional right, the reversal of Almeida-Sanchez' conviction was plainly error.

    Other defects of today's new formulation are also patent. First, this new doctrine could stop dead in its tracks judicial development of Fourth Amendment rights. For if evidence is to be admitted in criminal trials in the absence of clear precedent declaring the search in question unconstitutional, the first duty of a court will be to deny the accused's motion to suppress if he cannot cite a case invalidating a search or seizure on identical facts. 14 Yet, even its opponents concede [422 U.S. 531, 555]   that the great service of the exclusionary rule has been its usefulness in forcing judges to enlighten our understanding of Fourth Amendment guarantees. "It is . . . imperative to have a practical procedure by which courts can review alleged violations of constitutional rights and articulate the meaning of those rights. The advantage of the exclusionary rule - entirely apart from any direct deterrent effect - is that it provides an occasion for judicial review, and it gives credibility to the constitutional guarantees. By demonstrating that society will attach serious consequences to the violation of constitutional rights, the exclusionary rule invokes and magnifies the moral and educative force of the law. Over the long term this may integrate some fourth amendment ideals into the value system or norms of behavior of law enforcement agencies." Oaks, Studying the Exclusionary Rule in Search and Seizure, 37 U. Chi. L. Rev. 665, 756 (1970) (hereafter Oaks). See also Amsterdam, Perspectives on the Fourth Amendment, 58 Minn. L. Rev. 349, 429-430 (1974) (hereafter Amsterdam). While distinguished authority has suggested that an effective affirmative remedy could equally serve that function, see Oaks, supra, and Bivens v. Six Unknown Federal Narcotics Agents, 403 U.S. 388, 420 -423 (1971) (BURGER, C. J., dissenting), no equally effective alternative has yet been devised. [422 U.S. 531, 556]  

    Second, contrary to the Court's assumption, the exclusionary rule does not depend in its deterrence rationale on the punishment of individual law enforcement officials. 15 Indeed, one general fallacy in the reasoning of critics of the exclusionary rule is the belief that the rule is meant to deter official wrongdoers by punishment or threat of punishment. It is also the fallacy of the Court's attempt today to outline a revision in the exclusionary rule.

    Deterrence can operate in several ways. The simplest is special or specific deterrence - punishing an individual so that he will not repeat the same behavior. But "[t]he exclusionary rule is not aimed at special deterrence since it does not impose any direct punishment on a law enforcement official who has broken the rule. . . . The exclusionary rule is aimed at affecting the wider audience of all law enforcement officials and society at [422 U.S. 531, 557]   large. It is meant to discourage violations by individuals who have never experienced any sanction for them." Oaks 709-710. 16  

    Thus, the exclusionary rule, focused upon general, not specific, deterrence, depends not upon threatening a sanction for lack of compliance but upon removing an inducement to violate Fourth Amendment rights. Elkins v. United States, 364 U.S. 206, 217 (1960), clearly explained that the exclusionary rule's "purpose is to deter - to compel respect for the constitutional guaranty in the only effectively available way - by removing the incentive to disregard it." (Emphasis added.) "A criminal court system functioning without an exclusionary rule . . . is the equivalent of a government purchasing agent paying premium prices for evidence branded with the stamp of unconstitutionality. . . . If [the Government] receives the products of [illegal] searches and seizures . . . and uses them as the means of convicting people whom the officer conceives it to be his job to get convicted, it is not merely tolerating but inducing unconstitutional [422 U.S. 531, 558]   searches and seizures." Amsterdam 431-432. 17 (Emphasis supplied.)

    We therefore might consider, in this light, what may have influenced the officials who authorized roving searches without probable cause under the supposed authority of 8 U.S.C. 1357 (a) (3) and 8 CFR 287.1 (a) (2) (1973). 18 The statute is at best ambiguous as to [422 U.S. 531, 559]   whether probable cause is required, though quite explicit that a warrant is not. 19 The officials could therefore read the statute in one of two ways. They could read it not to require probable cause, regard as irrelevant Carroll v. United States, 267 U.S. 132 (1925), requiring probable cause, though no warrant, before stopping and searching a moving automobile unless the search is at the border, and command their subordinates to stop at random any car within 100 miles of the border and search for illegal aliens. Or they could conclude that because the statute is silent about probable cause, and because Carroll seems to require it, they should instruct their subordinates to stop moving vehicles away from the border only if there is some good reason to believe that they contain illegal aliens. Obviously, today's decision is a wide-open invitation to pursue the former course, because if this Court later decides that the officers guessed wrong in a particular case, one conviction will perhaps be lost, but many will have been gained, see supra, at 549, 554. The concept of the exclusionary rule until today, however, was designed to discourage officials from invariably opting for the choice that compromises Fourth Amendment rights, even though that rule has not worked perfectly as it did not in this case. "The efforts of the courts and their officials to bring the guilty to punishment, praiseworthy as they are, are not to be aided by the sacrifice of those great principles established by years of endeavor and [422 U.S. 531, 560]   suffering which have resulted in their embodiment in the fundamental law of the land." Weeks, 232 U.S., at 393 (emphasis supplied).

    Aside from this most fundamental error, solid practical reasons militate forcefully in favor of rejection of today's suggested road to revision of the exclusionary rule. This Court has already rejected a case-by-case approach to the exclusionary rule. After Wolf v. Colorado, 338 U.S. 25 (1949), had held the Fourth Amendment applicable to the States without also requiring the States to follow the exclusionary rule of Weeks, Irvine v. California, 347 U.S. 128 (1954), presented the opportunity of compelling the States to apply Weeks in especially egregious situations such as Irvine's. The Court rejected the opportunity because "a distinction of the kind urged would leave the rule so indefinite that no state court could know what it should rule in order to keep its processes on solid constitutional ground." Id., at 134 (opinion of Jackson, J.). See also id., at 138 (Clark, J., concurring).

    Today's formulation extended to all search-and-seizure cases would inevitably introduce the same uncertainty, by adding a new layer of fact finding in deciding motions to suppress in the already heavily burdened federal courts. The district courts would have to determine, and the appellate courts to review, subjective states of mind of numerous people, see n. 18 supra, and reasonable objective extrapolations of existing law, on each of the thousands of suppression motions presented each year. 20 Nice questions will have to be faced, such as whether to exclude evidence obtained in a search which officers believed [422 U.S. 531, 561]   to be unconstitutional but which in fact was not, and whether to exclude evidence obtained in a search in fact unconstitutional and believed to be unconstitutional, but which the ordinary, reasonable police officer might well have believed was constitutional. One criticism of the present formulation of the exclusionary rule is that it may deflect the inquiry in a criminal trial from the guilt of the defendant to the culpability of the police. The formulation suggested today would vastly exacerbate this possibility, heavily burden the lower courts, and worst of all, erode irretrievably the efficacy of the exclusion principle. 21 Indeed, "no [federal] court could know what it should rule in order to keep its processes on solid constitutional ground." Cf. 347 U.S., at 134 . Because of the superficial and summary way that the Court treats the question the formulation will, I am certain, be unsatisfactory even to those convinced, as I am not, that the exclusionary rule must be drastically overhauled. 22  

    If a majority of my colleagues are determined to discard the exclusionary rule in Fourth Amendment cases, they should forthrightly do so, and be done with it. This business of slow strangulation of the rule, with no [422 U.S. 531, 562]   opportunity afforded parties most concerned to be heard, would be indefensible in any circumstances. But to attempt covertly the erosion of an important principle over 61 years in the making as applied in federal courts clearly demeans the adjudicatory function, and the institutional integrity of this Court.

    [ Footnote 1 ] This requirement has been variously stated. See, e. g., Desist v. United States, 394 U.S. 244, 248 (1969) ("a clear break with the past"); Milton v. Wainwright, 407 U.S. 371, 381 n. 2 (1972) (STEWART, J., dissenting) ("a sharp break in the web of the law"); Chevron Oil Co. v. Huson, 404 U.S. 97, 106 (1971) ("the decision to be applied nonretroactively must establish a new principle of law, either by overruling clear past precedent on which litigants may have relied . . . or by deciding an issue of first impression whose resolution was not clearly foreshadowed . . .").

    [ Footnote 2 ] Nor is there anything in the legislative history of 1357 (a) which suggests that Congress intended to authorize the Border Patrol to stop any car in motion within 100 miles of a border. See H. R. Rep. No. 186, 79th Cong., 1st Sess., 2 (1945); S. Rep. No. 632, 79th Cong., 1st Sess., 2 (1945). See also United States v. Almeida-Sanchez, 452 F.2d 459, 465 (CA9 1971) (Browning, J., dissenting): "The more reasonable interpretation of a statute of this sort is not that it defines a constitutional standard of reasonableness for searches by the government agents to whom it applies, but rather that it delegates authority to be exercised by those agents in accordance with constitutional limitations. . . . The statute authorizes the officers to conduct such searches - and a search within the statute's terms is not illegal as beyond the officer's statutory authority. But a search within the literal language of the [statute] is nonetheless barred if it violates the Fourth Amendment. See, e. g., Boyd v. United States, 116 U.S. 616 . . . (1886)."

    [ Footnote 3 ] In Cervantes, the court said: "The government . . . appears to accept appellant's proposition that the reasonableness of a search made of an automobile on the highway and its driver depends upon a showing of probable cause. . . . That this is the proper test of the reasonableness of such a search, see Carroll v. United States, supra, 267 U.S., at pages 155-156 . . . ." 263 F.2d, at 803, and n. 4. Despite this general language, Cervantes was later summarily distinguished as applying only to searches for contraband, and not to searches for aliens. Fumagalli v. United States, 429 F.2d, at 1013. No attempt was ever made to explain how a search for aliens could be distinguished under Carroll from a search for contraband. See United States v. Almeida-Sanchez, 452 F.2d, at 464 (Browning, J., dissenting).

    [ Footnote 4 ] Title 19 U.S.C. 482 provides in pertinent part: "Any of the officers or persons authorized to board or search vessels may stop, search, and examine, as well without as within their respective districts, any vehicle, . . . or person, on which or whom he or they shall suspect there is merchandise which is subject to duty, or shall have been introduced into the United States in any manner contrary to law . . . ."

      "In order to avoid conflict between this statute and the Fourth Amendment, the statutory language has been restricted by the courts to `border searches.'" United States v. Weil, 432 F.2d 1320, 1323 (CA9 1970).

    [ Footnote 5 ] Most cases where the Court has ordained prospective application of a new rule of criminal procedure have involved decisions which explicitly overruled a previous decision of this Court. See Linkletter v. Walker, 381 U.S. 618 (1965), involving the retroactivity of Mapp v. Ohio, 367 U.S. 643 (1961), which had overruled Wolf v. [422 U.S. 531, 548]   Colorado, 338 U.S. 25 (1949); Williams v. United States, 401 U.S. 646 (1971), involving the retroactivity of Chimel v. California, 395 U.S. 752 (1969), which overruled United States v. Rabinowitz, 339 U.S. 56 (1950), and Harris v. United States, 331 U.S. 145 (1947); Fuller v. Alaska, 393 U.S. 80 (1968) (per curiam), involving the retroactivity of Lee v. Florida, 392 U.S. 378 (1968), which overruled Schwartz v. Texas, 344 U.S. 199 (1952); Desist v. United States, 394 U.S. 244 (1969), involving the retroactivity of Katz v. United States, 389 U.S. 347 (1967), which specifically rejected Goldman v. United States, 316 U.S. 129 (1942), and Olmstead v. United States, 277 U.S. 438 (1928); Tehan v. United States ex rel. Shott, 382 U.S. 406 (1966), involving the retroactivity of Griffin v. California, 380 U.S. 609 (1965), which overruled Twining v. New Jersey, 211 U.S. 78 (1908); Daniel v. Louisiana, 420 U.S. 31 (1975), involving the retroactivity of Taylor v. Louisiana, 419 U.S. 522 (1975), which specifically disapproved Hoyt v. Florida, 368 U.S. 57 (1961).

    In other instances, the practice recently disapproved had, at least arguably, been sanctioned previously by this Court. See Johnson v. New Jersey, 384 U.S. 719, 731 (1966); Gosa v. Mayden, 413 U.S. 665, 673 (1973) (opinion of BLACKMUN, J.); Adams v. Illinois, 405 U.S. 278 (1972).

    Finally, in another group of cases, the rule applied prospectively was merely a prophylactic one, designed by this Court to protect underlying rights already announced and applicable retroactively. See Halliday v. United States, 394 U.S. 831 (1969) (per curiam); Stovall v. Denno, 388 U.S. 293 (1967); Michigan v. Payne, 412 U.S. 47 (1973).

    [ Footnote 6 ] Of course, we have always given the benefit of a criminal procedure decision to the defendant in whose case the principle was announced. See Stovall v. Denno, supra, at 301.

    [ Footnote 7 ] I continue to believe that Mr. Justice Harlan and Mr. Justice Fortas were in error in Desist itself, because Katz v. United States, supra, did overrule clear past precedent of this Court. But I think that the prophecy of horrors by the dissenters in Desist has, with the Court's opinion today, come true.

    [ Footnote 8 ] See also Michigan v. Tucker, 417 U.S. 433, 453 n. 26 (1974):

      "Under the framework of the analysis established in Linkletter, supra, and in subsequent cases, it would seem indispensable to understand the basis for a constitutional holding of the Court in order to later determine whether that holding should be retroactive."

    [ Footnote 9 ] The exclusionary rule in federal cases has roots that antedate even Weeks. Twenty-eight years before that decision, in Boyd v. United States, 116 U.S. 616 (1886), the Court held that the admission into evidence of papers acquired by the Government in violation of the Fourth Amendment was unconstitutional. Id., at 638.

    [ Footnote 10 ] I emphasize that this is a federal criminal case, and that the exclusionary rule issue comes to us on direct review. Thus, neither Mapp v. Ohio, 367 U.S. 643 (1961), applying the Fourth Amendment exclusionary rule to the States, nor Kaufman v. United States, 394 U.S. 217 (1969), permitting Fourth Amendment exclusionary rule issues to be raised for the first time in collateral proceedings, is here involved. While abandonment of both Mapp and Kaufman has at times been advocated, no Justice has intimated that Weeks should also be overruled, at least in the absence of suitable and efficacious substitute remedies. See, on Mapp, Coolidge v. New Hampshire, 403 U.S. 443, 490 (1971) (Harlan, J., concurring); id., at 492 (BURGER, C. J., dissenting in part and concurring in part); id., at 493 (Black, J., concurring and dissenting); id., at 510 (statement of BLACKMUN, J.); on Kaufman, see Schneckloth v. Bustamonte, 412 U.S. 218, 250 (1973) (POWELL, J., joined by BURGER, C. J., and REHNQUIST, J., concurring); see also, id., at 249 (BLACKMUN, J., concurring). But see, on Weeks, Bivens v. Six Unknown Federal Narcotics Agents, 403 U.S. 388, 420 -421 (1971) (BURGER, C. J., dissenting); Schneckloth, supra, at 267-268, n. 25 (POWELL, J., concurring).

    [ Footnote 11 ] Wolf v. Colorado, 338 U.S. 25, 28 (1949), summarized Weeks as follows: "In Weeks v. United States, supra, this court held that in a federal prosecution the Fourth Amendment barred the use of evidence secured through an illegal search and seizure." (Emphasis [422 U.S. 531, 553]   added.) Elkins v. United States, 364 U.S. 206, 212 -213 (1960), again confirmed the Weeks rule, "[e]vidence which had been seized by federal officers in violation of the Fourth Amendment [can]not be used in a federal criminal prosecution" (emphasis added), and expanded it to cover "evidence obtained by state officers during a search which, if conducted by federal officers, would have violated the defendant's immunity from unreasonable searches and seizures under the Fourth Amendment," id., at 223 (emphasis added); see also id., at 222. Similarly, Ker v. California, 374 U.S. 23, 30 (1963), stated that the exclusionary rule "forbids the Federal Government to convict a man of crime by using testimony or papers obtained from him by unreasonable searches and seizures as defined in the Fourth Amendment" (emphasis supplied); see also id., at 34. Thus, the test whether evidence should be suppressed in federal court has always been solely whether the Fourth Amendment prohibition against "unreasonable" searches and seizures was violated, nothing more and nothing less. See also, e. g., Alderman v. United States, 394 U.S. 165, 176 (1969); United States v. Calandra, 414 U.S. 338, 347 (1974).

    [ Footnote 12 ] To be sure, the very vagueness of the intimated reformulation as articulated today leaves unclear exactly what showing demonstrates that a law enforcement officer "may properly be charged with knowledge, that the search was unconstitutional." In this case, for example, could the Border Patrol, a national organization, have been charged with knowledge of the unconstitutionality of an Almeida-Sanchez type search if the courts of appeals were in clear conflict on whether probable cause was required?

    [ Footnote 13 ] It is gratifying that the Court at least verbally restores to exclusionary-rule analysis this consideration, which for me is the core value served by the exclusionary rule. See Harris v. New [422 U.S. 531, 554]   York, 401 U.S. 222, 231 -232 (1971) (BRENNAN, J., dissenting); United States v. Calandra, supra, at 355 (BRENNAN, J., dissenting). But the Court's treatment of this factor is wholly unsatisfactory. See id., at 359-360 (BRENNAN, J., dissenting). I need discuss the question no further, however, since the Court merges the "imperative of judicial integrity" into its deterrence rationale, ante, at 538, and then ignores the imperative when it applies its new theory to the facts of this case, see Part II of the Court's opinion. Rather, I show in the text that, on the Court's own deterrence rationale alone, today's suggested reformulation would be a disaster.

    [ Footnote 14 ] Angelet v. Fay, 381 U.S. 654 (1965), declined to decide whether Mapp v. Ohio, 367 U.S. 643 (1961), would bar federal agents from testifying in a state court concerning illegally obtained [422 U.S. 531, 555]   evidence, because Mapp was held in Linkletter v. Walker, 381 U.S. 618 (1965), to be nonretroactive. Somewhat similarly, Michigan v. Tucker, 417 U.S. 433 (1974), refused to decide whether Miranda v. Arizona, 384 U.S. 436 (1966), applies to exclude the testimony of a witness discovered as a result of a statement given after incomplete Miranda warnings, because the interrogation in Tucker occurred before Miranda. See also Michigan v. Payne, 412 U.S., at 49 -50, n. 3. Thus, there is clear precedent for avoiding decision of a constitutional issue raised by police behavior when in any event the evidence was admissible in the particular case at bar.

    [ Footnote 15 ] Critics of the exclusionary rule emphasize that in actual operation law enforcement officials are rarely reprimanded, discharged, or otherwise disciplined when evidence is excluded at trial for search-and-seizure violations. While this fact, to the extent it is true, may limit the efficacy of the exclusionary rule, it does not, for the reasons stated in the text, prove it useless. Suggestions are emerging for tailoring the exclusionary rule to the adoption and enforcement of regulations and training procedures concerning searches and seizures by law enforcement agencies. Amsterdam 409 et seq.; Kaplan, The Limits of the Exclusionary Rule, 26 Stan. L. Rev. 1027, 1050 et seq. (1974). Today's approach, rather than advancing this goal, would diminish the incentive for law enforcement agencies to train and supervise subordinate officers. See id., at 1044. At any rate, to the extent law enforcement agencies do visit upon individual employees consequences for conducting searches and seizures which are later held illegal, the agencies can be expected to take account of the degree of departure from existing norms as elucidated in court decisions. Thus, there is no need for the courts to adjust the exclusionary rule in order to assure fairness to individual officials or to promote decisiveness.

    [ Footnote 16 ] See also Amsterdam 431:

      "The common focus on the concept of `deterrence' in the debate over the exclusionary rule can be quite misleading. It suggests that the police have God-given inclination to commit unconstitutional searches and seizures unless they are `deterred' from that behavior. Once this assumption is indulged, it is easy enough to criticize the rule excluding unconstitutionally obtained evidence on the ground that it `does not apply any direct sanction to the individual officer whose illegal conduct results in the exclusion,' and so cannot `deter' him. But no one, to my knowledge, has ever urged that the exclusionary rule is supportable on this principle of `deterrence.' It is not supposed to `deter' in the fashion of the law of larceny, for example, by threatening punishment to him who steals a television set - a theory of deterrence, by the way, whose lack of empirical justification makes the exclusionary rule look as solid by comparison as the law of gravity."

    [ Footnote 17 ] See also Oaks 711:

      "`The act is branded as reprehensible by authorized organs of society,' Andenaes states, `and this official branding of the conduct may influence attitudes quite apart from the fear of sanctions.' The existence and imposition of a sanction reinforces the rule and underlines the importance of observing it. The principle is directly applicable to the exclusionary rule. The salient defect in the rule of Wolf v. Colorado was the difficulty of persuading anyone that the guarantees of the fourth amendment were seriously intended and important when there was no sanction whatever for their violation. As a visible expression of social disapproval for the violation of these guarantees, the exclusionary rule makes the guarantees of the fourth amendment credible. Its example teaches the importance attached to observing them."

    [ Footnote 18 ] I assume that the Court's statement that "the purpose of the exclusionary rule is to deter unlawful police conduct," ante, at 542, does not imply that deterrence can work only at the level of the individual officers on the scene, nor suggest that under its approach only the knowledge, real or constructive, of the official conducting the search is relevant. Fourth Amendment violations become more, not less, reprehensible when they are the product of Government policy rather than an individual policeman's errors of judgment. See Alderman v. United States, 394 U.S., at 203 (Fortas, J., concurring in part and dissenting in part).

      "[T]he Fourth Amendment was intended to secure the citizen in person and property against unlawful invasion of the sanctity of his home by officers of the law acting under legislative or judicial sanction. This protection is equally extended to the action of the Government and officers of the law acting under it . . . ." Weeks v. United States, 232 U.S. 383, 394 (1914). (Emphasis supplied.) Obviously, any rule intended to prevent Fourth Amendment violations must operate not only upon individual law enforcement officers [422 U.S. 531, 559]   but also upon those who set policy for them and approve their actions. Otherwise, for example, evidence derived from any search under a warrant could be admissible, because the searching policeman, having had a warrant approved by the designated judicial officer, had every reason to believe the warrant valid. Certainly, the Court can intend no such result, and would have lower courts inquire into the frame of mind, actual and constructive, of all officials whose actions were relevant to the search.

    [ Footnote 19 ] See supra, at 545, and n. 2.

    [ Footnote 20 ] In addition, adding "one more fact finding operation, and an especially difficult one to administer, to those already required of [the] lower judiciary" could add a factor of discretion to the operation of the exclusionary rule impossible for the appellate courts effectively to control. Kaplan, supra, n. 15, at 1045.

    [ Footnote 21 ] Indeed, Congress in recent years has declined to take steps somewhat similar to those now proposed. See Canon, Is the Exclusionary Rule in Failing Health? Some New Data and a Plea Against a Precipitous Conclusion, 62 Ky. L. J. 681, 694-696 (1974).

    [ Footnote 22 ] For example, the modification of the exclusionary rule most discussed recently has been that in the ALI Model Code of Pre-Arraignment Procedure 290.2 (2) (Prop. Off. Draft No. 1, 1972). See Bivens, 403 U.S., at 424 (Appendix to opinion of BURGER, C. J., dissenting); Canon, supra, n. 21, at 694-696. While the ALI proposal raises many of the same questions I have outlined above, it differs substantially from the Court's proposed approach, since it takes into account many factors besides "(c) the extent to which the violation was willful." [422 U.S. 531, 563]  

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