United States v. Ruiz, 536 U.S. 622 (2002), was a decision by the United States Supreme Court in which the Court held that Brady v. Maryland did not require prosecutors to disclose impeachment evidence during plea bargaining.

[1] The United States Court of Appeals for the Ninth Circuit granted the vacatur, finding that a plea is not voluntary unless the prosecution disclosed impeachment information to the defendant.

This constituted a violation of the rule in United States v. Brady that pleas have to be voluntarily, knowingly, and intelligently made.

[1] The Supreme Court reversed the Ninth Circuit and gave three primary reasons for doing so.

[2] First, the Court stated that "impeachment information is special in relation to the fairness of a trial, not in respect to whether a plea is voluntary.