"Under the Fourth and Fourteenth Amendments, an arresting officer may, without a warrant search a person validly arrested. Amendment Four to the Constitution was ratified on December 15, 1791.It protects the American people from unreasonable searches and seizures. Debates over the scope of unreasonable searches and seizures sparked the American Revolution as we'll learn in a moment. The Fourth Amendment to the U.S. Constitution protects individuals from unreasonable searches and seizures. Marijuana was discovered in the glove compartment. Searches and Seizures Pursuant to Warrant. (1) Fourth Amendment: DNA Sample. The Fourth Amendment protects citizens against unreasonable searches and seizures. The Fourth Amendment protects citizens against warrantless searches and seizures, but what qualifies as a seizure?