Mapp v. Ohio — Quick Summary

Mapp v. Ohio

Mapp v. Ohio, 367 U.S. 643 (1961)

In Brief

Mapp v. Ohio is a landmark decision in American constitutional law that expanded the rights of defendants in state courts by incorporating the Fourth Amendment's exclusionary rule into state jurisdiction through the Fourteenth Amendment's Due Process Clause.

Key Issue

Does the exclusionary rule, which prohibits the use of illegally obtained evidence in federal court, apply to state courts through the Fourteenth Amendment's Due Process Clause?

The Rule

The exclusionary rule, which prohibits the use of evidence obtained in violation of the Fourth Amendment, applies to state courts through the Fourteenth Amendment's Due Process Clause.

Bottom Line

Yes, the Supreme Court held that evidence obtained in violation of the Fourth Amendment is inadmissible in state court prosecutions due to the incorporation of the exclusionary rule through the Fourteenth Amendment.

Why It Matters

Mapp v. Ohio is crucial for law students as it elucidates the process of incorporation, wherein protections in the Bill of Rights are made applicable to the states through the Fourteenth Amendment. It also reflects the evolving nature of rights protection and emphasizes the judiciary's role in upholding civil liberties. The case serves as a foundational precedent in both constitutional law and criminal procedure, illustrating the impact of judicial decision-making on the balance of individual freedoms and state authority.

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