Kyles v. Whitley

After his first trial in 1984 ended in a hung jury, petitioner Curtis Lee Kyles was tried again, convicted of first-degree murder, and sentenced to death. On habeas review, we follow the established rule that the state’s obligation under Brady v. Maryland, 373 U. S. 83 (1963), to disclose evidence favorable to the defense, turns on the cumulative effect of all such evidence suppressed by the government, and we hold that the prosecutor remains responsible for gauging that effect regardless of any failure by the police to bring favorable evidence to the prosecutor’s attention. Because the net…