Mapp v. Ohio

In Mapp v. Ohio (1961), the Supreme Court extended its decision on the federal exclusionary rule from Weeks v. United States (1914) and overruled the precedent of Wolf v. Colorado (1949).

In Weeks, the court held that evidence obtained without a search warrant, and, therefore, in violation of Fourth Amendment protections against “unlawful search and seizure,” could not be used in federal criminal prosecutions. The court, however, did not specify whether the exclusionary rule applied to state criminal prosecutions. In Wolf, the court held that state courts were bound by ...