The following excerpt is from Riel v. Warden, No. 2:01-cv-0507 MCE DAD (E.D. Cal. 2015):
A conviction obtained through the use of false evidence violates a defendant's due process rights. Napue v. Illinois, 360 U.S. 264, 269 (1959). This is true whether the prosecutor knew the evidence was false or should have known it was false. United States v. Agurs, 427 U.S. 97, 103
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