Code of Criminal Procedure · U.S. Supreme Court, 1961

Mapp v. Ohio

Mapp v. Ohio is a 1961 U.S. Supreme Court decision. This page summarizes key points and works through practice questions for Texas peace officer exam preparation.

Key points

  • Fourth Amendment incorporated against states via 14th Amendment
  • Federal exclusionary rule applies in state courts
  • Texas adds Art. 38.23 (broader statutory exclusion)

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Worked examples

Worked example 1

Under Mapp v. Ohio (1961), the federal exclusionary rule applies to:

  1. Federal cases only
  2. All state criminal proceedings via the Fourteenth Amendment Correct
  3. Civil cases only
  4. Only federal felony cases
Why: Mapp incorporated the federal exclusionary rule against the states. Texas additionally has its broader statutory exclusionary rule under Art. 38.23.
Statute: Mapp v. Ohio, 367 U.S. 643 (1961)