The Start of a Revolution: Mapp v. Ohio and the Warren Court’s Fourth Amendment Case that Almost Wasn’t

Mapp v. Ohio tells the remarkable story of Dollree Mapp and her encounter with the Cleveland, Ohio, police during a search of her home. Although they were there on suspicion of criminal activity unrelated to her, Dollree eventually became the center of the Warren Court’s inquiry into expanding the Exclusionary Rule to the states. A case that started out as a First Amendment issue, was eventually decided on Fourth Amendment grounds. While Mapp v. Ohio is regarded as the start of the Warren Court’s criminal procedure revolution, the true delight of this case lies in the story of Dollree Mapp and her journey into Supreme Court spotlight as one of the most important cases of the 20th Century.