This Fourth Amendment activity is based on the landmark Supreme Court case Brendlin v. California, dealing with search and seizure during a traffic stop.The Fourth Amendment prohibits the United States government from conducting "unreasonable searches and seizures. The right of the people to be secure in their persons houses papers and effects against unreasonable searches and seizures shall not be violated. Amendment Four to the Constitution was ratified on December 15, 1791. It protects the American people from unreasonable searches and seizures. The Fourth Amendment's rule against unreasonable searches and seizures mean the police cannot search you or your vehicle unless one of the following is true. The Fourth Amendment protects against unreasonable searches and seizures; these constitutional protections fully apply to cell phone searches. Obtaining a warrant is not always feasible, especially in situations where it could result in the destruction of evidence. Have students write three to five sentences summarizing their understanding of the Fourth.