In Wolf v. Colorado, 338 U.S. 25 (1949), the 6-3 U.S. Supreme Court held that a conviction by a State court for a State offense does not deny the "due process of law" required by the Fourteenth Amendment solely because evidence that was admitted at the trial was obtained under circumstances which would have rendered it inadmissible in a prosecution for violation of a federal law in a court of the United States because there deemed to be an infraction of the Fourth Amendment. Justice Felix Frankfurter wrote the decision for the Court.
This decision was overruled a mere 12 years later, in Mapp v. Ohio.