Mapp v Ohio | US Constitutional Law | Legal Education

A landmark case that applied the exclusionary rule remedy for 4th Amendment violations to all 50 States. Mapp v Ohio overruled Wolf v Colorado, 338 US 25 (1949) which held that States were bound by the Due Process clause of the 14th Amendment and could fashion their own remedy for unlawful and unreasonable search and seizures but were not necessarily required to exclude it.

States who didn't follow the Exclusionary Rule before Mapp had to revamp how they trained police and conducted investigations now that 4th Amendment violations resulted in excluded evidence.
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Case Excerpt:

The ignoble shortcut to conviction left open to the State tends to destroy the entire system of constitutional restraints on which the liberties of the people rest. Having once recognized that the right to privacy embodied in the Fourth Amendment is enforceable against the States, and that the right to be secure against rude invasions of privacy by state officers is, therefore, constitutional in origin, we can no longer permit that right to remain an empty promise. Because it is enforceable in the same manner and to like effect as other basic rights secured by the Due Process Clause, we can no longer permit it to be revocable at the whim of any police officer who, in the name of law enforcement itself, chooses to suspend its enjoyment. Our decision, founded on reason and truth, gives to the individual no more than that which the Constitution guarantees him, to the police officer no less than that to which honest law enforcement is entitled, and, to the courts, that judicial integrity so necessary in the true administration of justice.
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