The right to present witnesses is not absolute, however; a court may refuse to allow a defense witness to testify when the court finds that defendant's counsel willfully failed to identify the witness in a pretrial discovery request and thereby attempted to gain a tactical advantage. 189
In Pennsylvania v. Ritchie, the Court indicated that requests to compel the government to reveal the identity of witnesses or produce exculpatory evidence should be evaluated under due process rather than compulsory process analysis, adding that ''compulsory process provides no greater protections in this area than due process.'' 190
Footnotes
[Footnote 186] United States v. Cooper, 4 U.S. (4 Dall.) 341 (C.C. Pa. 1800) (Justice Chase on circuit).
[Footnote 187] 3 J. Story, Commentaries on the Constitution of the United States 1786 (1833). See Rosen v. United States, 245 U.S. 467 (1918).
[Footnote 188] Washington v. Texas, 388 U.S. 14, 19 -23 (1967). Texas did permit coparticipants to testify for the prosecution.
[Footnote 189] Taylor v. Illinois, 484 U.S. 400 (1988).
[Footnote 190] 480 U.S. 39, 56 (1987) (ordering trial court review of files of child services agency to determine whether they contain evidence material to defense in child abuse prosecution).