Brady material

Definition from Nolo’s Plain-English Law Dictionary

Evidence known to the prosecution that is favorable to the defense. Under the U.S. Supreme Court case of Brady v. Maryland, the prosecution's failure to hand over this exculpatory evidence is a violation of a defendant's due-process rights, but if the defendant is convicted, this error won't necessarily result in a reversal of the conviction.

Definition provided by Nolo’s Plain-English Law Dictionary.