Mapp v. Ohio [1961]

367 U.S. 643 (1961) · Supreme Court of the United States · United States

criminal law and procedurecriminal law and procedureevidence law

Issue

Does the exclusionary rule apply to the states?

Held

Yes. Unconstitutionally obtained evidence is inadmissible in state criminal trials.

Exam use

Review the ratio and reasoning before applying this case in problem questions.

Summary

Major incorporation decision for search-and-seizure remedies.

Facts

Police searched Dollree Mapp's home without a valid warrant and found evidence later used in prosecution.

Issue

Does the exclusionary rule apply to the states?

Held

Yes. Unconstitutionally obtained evidence is inadmissible in state criminal trials.

Ratio Decidendi

Evidence obtained in violation of the Fourth Amendment is generally excluded in state and federal prosecutions.

Reasoning

Exclusion deters unlawful searches and gives effect to Fourth Amendment rights.

Essay-Ready Explanation Generator

Version 1 of 4

Reference to Mapp v. Ohio (367 U.S. 643 (1961)) strengthens a criminal law and procedure answer because the case reflects the principle that Evidence obtained in violation of the Fourth Amendment is generally excluded in state and federal prosecutions. Applied to a problem question, the case should be used after identifying the issue as Does the exclusionary rule apply to the states? The stronger essay move is to connect the material facts to the court's holding, then explain whether the present facts support the same conclusion or justify distinguishing the authority.

Significance

Major incorporation decision for search-and-seizure remedies.

Related Cases

No related cases listed.

Exam Tips

Review the ratio and reasoning before applying this case in problem questions.

Revision Checklist

  • Name the issue before discussing facts so the marker sees the legal question immediately.
  • State the holding in one sentence, then use the ratio to explain why the court reached that result.
  • Use the citation and jurisdiction to show why this authority matters for the problem you are answering.
  • Pair this case with one supporting or contrasting authority if the question tests limits, policy, or exceptions.

Sources