What Supreme Court case determined that all states must follow the exclusionary rule regarding evidence that can be used in courts?

Mapp v. Ohio

Gideon v. Wainwright

Texas v. Johnson

Engel v. Vitale

The right option is the first, Mapp v. Ohio.

This case, decided by the U. S. Supreme Court on June 19, 1961, ruled (6-3), it was stated, strenghtened the effects of the exclusionary rule, which was debated in other cases (Bram v. United States, Wolf v. Colorado and others). It states that evidence obtained through violation of the Fourth Amendment to the U. S. Constitution, which prohibits "unreasonable searches and seizures," is inadmissible in all state courts.