United States v. Bagley

In Brady v. Maryland, 373 U. S. 83, 87 (1963), this Court held that “the suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or punishment.” The issue in the present case concerns the standard of materiality to be applied in determining whether a conviction should be reversed because the prosecutor failed to disclose requested evidence that could have been used to impeach Government witnesses.

I-H

In October 1977, respondent Hughes Anderson Bagley was indicted in the Western District of Washington on…