The Fourth Amendment to the United States Constitution prohibits the federal government from conducting "unreasonable searches and seizures. In the fall of 1958, she was tried, convicted, and sentenced to 1-7 years in the penitentiary.{¶ 2} The Fourth Amendment protects citizens from unreasonable searches and seizures. Mapp was arrested for possessing the pictures, and was convicted in an Ohio court. As in, they cannot gather evidence without a warrant. This case presents serious questions concerning the role of the Fourth Amendment in the confrontation on the street between the citizen and the policeman. Complete the questions in the following quiz to test your knowledge. ○ Test Your Knowledge: The Fourth Amendment. ABDELFATAH: In the decades after Terry, the court kept ruling on Fourth Amendment cases. In some instances, it limited police power.