1. The prosecution’s disclosure obligation extends not only to information in its own files but also to
information known to anyone assisting the prosecution with the case. This includes the police. The
failure of the police to bring favorable evidence to the prosecutor’s attention does not absolve the
prosecutor of its responsibility.
2. Favorable. To be favorable, the suppressed evidence must either negate the defendant’s guilt (such
as negative fingerprint or ballistics reports, negative eyewitness identifications, evidence that
someone else may have committed the crime, etc.), counter the prosecution’s theory of the case,
or impeach the credibility of key government witnesses (such as government promises of monetary
compensation or leniency in exchange for their testimony; criminal histories; pending criminal
charges against them, etc.)
▪ Kyles v. Whitley (Part II). Kyles was convicted of killing a 60-year-old woman in a grocery
store parking lot. Prior to the trial, Kyles’s attorney filed a motion for the prosecutor to disclose
any exculpatory or impeachment evidence and was told that there was none. The prosecution’s
themselves, as the final arbiters of the government’s obligation to ensure fair trials.”
▪ People v. Wright (Part II). This case was included to reinforce the important message that
police risk reversal of a conviction when they keep the prosecutor in the dark about evidence
favorable to the defense that might affect the outcome of a trial. Wright committed a “Lorena
Bobbitt” (severing penis with knife) on a man whom she claimed tried to rape her. Officer
Walczak was called to the scene of the crime to investigate. His investigative report noted that
the victim’s underwear was found in a location that was consistent with Wright’s account that