Mapp v. Ohio

Mapp v. Ohio

• A. Extended the exclusionary rule to state courts
• B. Overturned the exclusionary rule
• C. Established Miranda rights
• D. Allowed evidence obtained unlawfully

Answer: (A)

Extending the exclusionary rule to state courts is the key idea. In Mapp v. Ohio, the Supreme Court ruled that evidence obtained in violation of the Fourth Amendment cannot be used in state criminal prosecutions, applying this protection to state and local police as well. Before this decision, the exclusionary rule mainly governed federal prosecutions (Weeks v. United States). The Court reasoned that the Fourth Amendment protections are incorporated to the states through the Fourteenth Amendment, so state courts must suppress illegally obtained evidence. This upholds due process and keeps constitutional rights consistent across jurisdictions. The other options don’t fit: the ruling did not overturn the exclusionary rule, it did not establish Miranda rights, and it did not allow unlawfully obtained evidence.

Extending the exclusionary rule to state courts is the key idea. In Mapp v. Ohio, the Supreme Court ruled that evidence obtained in violation of the Fourth Amendment cannot be used in state criminal prosecutions, applying this protection to state and local police as well. Before this decision, the exclusionary rule mainly governed federal prosecutions (Weeks v. United States). The Court reasoned that the Fourth Amendment protections are incorporated to the states through the Fourteenth Amendment, so state courts must suppress illegally obtained evidence. This upholds due process and keeps constitutional rights consistent across jurisdictions. The other options don’t fit: the ruling did not overturn the exclusionary rule, it did not establish Miranda rights, and it did not allow unlawfully obtained evidence.