The Fourth Amendment to the U.S. Constitution gives citizens the right to be free from unreasonable searches and seizures. Under the Fourth Amendment to the US Constitution, the police are prohibited from conducting a search and seizure without "probable cause."The Fourth Amendment prohibits the United States government from conducting "unreasonable searches and seizures. The Fourth Amendment of the United States Constitution protects the People from unreasonable searches and seizures. The Fourth Amendment protects us from unreasonable search and seizures of our person, our house, our papers, and our effects. Whatever the case may be, police need probable cause to search a vehicle without a warrant. Most of these cases are filed in federal court under the Civil Rights Act, 42 U.S.C 1983. 48 On the other hand, the Court's solicitude for law enforcement objectives may tilt the balance in the other direction. The Supreme Court usually considers Fourth Amendment cases starting with a basic question, "Was there a search or a seizure? Amendment Four to the Constitution was ratified on December 15, 1791.