The Fourth Amendment governs how police many conduct searches and obtain evidence. In this Supreme Court case, The Court stated the Exclussionary Rule, that evidence obtained illegally cannot be presented in state courts. * Miranda v. Arizona Marbur

The Supreme Court case you are referring to is **Mapp v. Ohio**. In this landmark 1961 decision, the Court applied the exclusionary rule to state courts, ruling that evidence obtained in violation of the Fourth Amendment cannot be used in criminal prosecutions in state courts.