Case Law Index
federal1961
Additional Highlights:Fourth AmendmentExclusionary RuleCriminal Procedure
Mapp v. Ohio
United States Supreme Court
Key Holding
Evidence obtained through unconstitutional searches and seizures must be excluded from state criminal prosecutions, applying the federal exclusionary rule to the states.
Case Summary
Mapp v. Ohio extended the federal exclusionary rule to state courts, holding that evidence obtained in violation of the Fourth Amendment is inadmissible in state criminal proceedings, fundamentally shaping criminal procedure across the United States.
Related Cases
Primary Source: https://www.courtlistener.com/opinion/106285/mapp-v-ohio/