Mapp v. Ohio
Case Date: 05/04/1961
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Mapp v. Ohio, 367 U.S. 643 (1961), was a landmark case in criminal procedure, in which the United States Supreme Court decided that evidence obtained in violation of the Fourth Amendment, which protects against "unreasonable searches and seizures," may not be used in criminal prosecutions in state courts, as well as federal courts.
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