Which case established the requirement to inform suspects of their rights?

• A. Miranda v. Arizona
• B. Mapp v. Ohio
• C. Gideon v. Wainwright
• D. Roe v. Wade

Answer: (A)

The main concept here is the origin of the warning police must give to suspects before questioning. This obligation comes from the Supreme Court’s decision establishing the Miranda warnings, which require that someone in custody be informed of their rights, including the right to remain silent and the right to an attorney, with assurance that any statements made can be used in court. The ruling targets custodial interrogation to protect the Fifth Amendment against self-incrimination and the Sixth Amendment right to counsel, making statements obtained without these warnings potentially inadmissible.

That’s why this case is the best answer: it set the constitutional requirement for informing suspects of their rights. The other cases deal with different protections: Mapp v. Ohio is about the exclusion of illegally obtained evidence under the Fourth Amendment, Gideon v. Wainwright guarantees the right to counsel, and Roe v. Wade concerns abortion rights.