Which cases establish that the exclusionary rule applies to both federal and state courts?

Which cases establish that the exclusionary rule applies to both federal and state courts?

• A. Weeks v. United States; Mapp v. Ohio.
• B. Miranda v. Arizona.
• C. Gideon v. Wainwright.
• D. Brown v. Board of Education.

Answer: (A)

The main idea tested is how the exclusionary rule, which bars illegally obtained evidence, was applied to both federal and state courts. Weeks v. United States established the rule for federal courts, ruling that evidence obtained through an illegal search and seizure cannot be used in federal prosecutions. This sets the federal baseline for excluding unlawfully obtained evidence.

The next crucial step was to extend that protection to the states. Mapp v. Ohio held that the Fourth Amendment’s ban on unreasonable searches and seizures applies to state governments as well, through incorporation via the Fourteenth Amendment’s Due Process Clause. This means state courts are required to exclude evidence obtained in violation of the Fourth Amendment just as federal courts are.

The other cases listed focus on different constitutional rights— Miranda v. Arizona on warnings during custodial interrogation, Gideon v. Wainwright on the right to counsel, and Brown v. Board of Education on desegregation—so they do not address extending the exclusionary rule to state courts.