State and federal laws say that prosecutors might be guilty of committing a Brady violation if they fail to disclose:
certain reports that clear a defendant of a criminal act (like reports from police officers or experts),
details of a deal (for example, deals between federal prosecutors and government witnesses),
physical evidence (like DNA or video footage) that suggests a defendant is not guilty of a crime,
information that discredits a victim’s story or testimony,
evidence of police misconduct,
evidence that might show someone else committed the crime being charged, and
information that could be used as impeachment evidence against a witness.