514 U.S. 419 (1995)
Kyles v. Whitley is a landmark Supreme Court case that significantly shaped the interpretation and application of the Brady rule concerning the prosecutorial duty to disclose exculpatory evidence.
Whether the prosecution's failure to disclose exculpatory evidence that was material to the defense's case violated the defendant's right to a fair trial under Brady v. Maryland.
Under Brady v. Maryland, suppression by the prosecution of evidence favorable to the accused upon request violates due process where the evidence is material to either guilt or punishment, irrespective of the good or bad faith of the prosecution.
The Supreme Court held that the prosecution's failure to disclose the evidence did violate Kyles' due process rights. The Court concluded that the undisclosed evidence, when viewed collectively, was material because there was a reasonable probability that, had the evidence been disclosed, the result of the proceeding would have been different.
Kyles v. Whitley is particularly significant for its elucidation of the Brady materiality standard and its emphasis on the cumulative impact analysis of undisclosed evidence. It underscores the prosecutorial obligation to ensure fair trials by fully disclosing material exculpatory evidence. This case serves as a crucial guide for prosecutors, defense attorneys, and judges on how to handle undisclosed evidence and reflects the broader principles of justice and fairness in criminal procedure.