JUSTICE WECHT In 1997, Roderick Johnson was convicted on two counts of first-degree murder. He was sentenced to death. Several years later, Johnson discovered that the Commonwealth had concealed certain documents that would have cast doubt upon the credibility of a key. prosecution witness. The court of common pleas held that the Commonwealth’s failure to disclose this evidence violated Johnson’s right to due process of law, in accordance with Brady v. Maryland, 373 U.S. 83, 87, 83 S.Ct. 1194, 10 L.Ed.2d 215 (1963) (<HOLDING>). The court awarded Johnson a new trial. We
holding 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 to punishment irrespective of the good faith or bad faith of the prosecution holding that the prosecution must disclose evidence favorable to the accused that is material either to guilt or to punishment holding that suppression by the prosecution of evidence favorable to an accused  violates due process where the evidence is material either to guilt or to punishment irrespective of the good faith or bad faith of the prosecution holding that suppression by prosecutor of evidence favorable to an accused violates due process where evidence is material to either guilt or punishment holding that suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or to punishment