United States v. Armstrong, 517 U.S. 456, 8 (1996)

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Cite as: 517 U. S. 456 (1996)

Opinion of the Court

by the attorney for the government or other government agents in connection with the investigation or prosecution of the case."

Under Rule 16(a)(1)(C), a defendant may examine documents material to his defense, but, under Rule 16(a)(2), he may not examine Government work product in connection with his case. If a selective-prosecution claim is a "defense," Rule 16(a)(1)(C) gives the defendant the right to examine Government work product in every prosecution except his own. Because respondents' construction of "defense" creates the anomaly of a defendant's being able to examine all Government work product except the most pertinent, we find their construction implausible. We hold that Rule 16(a)(1)(C) authorizes defendants to examine Government documents material to the preparation of their defense against the Government's case in chief, but not to the preparation of selective-prosecution claims.

In Wade v. United States, 504 U. S. 181 (1992), we considered whether a federal court may review a Government decision not to file a motion to reduce a defendant's sentence for substantial assistance to the prosecution, to determine whether the Government based its decision on the defendant's race or religion. In holding that such a decision was reviewable, we assumed that discovery would be available if the defendant could make the appropriate threshold showing, although we concluded that the defendant in that case did not make such a showing. See id., at 186. We proceed on a like assumption here.

A selective-prosecution claim is not a defense on the merits to the criminal charge itself, but an independent assertion that the prosecutor has brought the charge for reasons forbidden by the Constitution. Our cases delineating the necessary elements to prove a claim of selective prosecution have taken great pains to explain that the standard is a demanding one. These cases afford a "background presumption," cf. United States v. Mezzanatto, 513 U. S. 196, 203

463

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