What constitutional issue did Mapp v. Ohio (1961) primarily address?

• A. The application of the Fourth Amendment to the federal government.
• B. Whether the Eighth Amendment protects against cruel and unusual punishment in state cases.
• C. Illegally seized evidence could not be used in a state criminal trial. Violation of the Fourth Amendment.
• D. Whether the Fifth Amendment due process applies to the states.

Answer: (C)

The main idea is how the Fourth Amendment’s protections against unreasonable searches and seizures apply to state courts. Mapp v. Ohio held that illegally obtained evidence cannot be used in a state criminal trial. This established that the exclusionary rule—previously applied only to federal prosecutions—applies to states as well, through the Fourteenth Amendment’s due process clause. In other words, states must honor the same Fourth Amendment rights as the federal government, and evidence seized in violation of those rights is typically inadmissible in state court.

This ruling strengthens individual rights in state prosecutions by deterring unlawful searches and ensuring a consistent standard across federal and state cases. The other options miss the focus on the suppression of illegally seized evidence in state court, instead pointing to different amendments or broader due-process ideas unrelated to the exclusionary rule's extension.