"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. The Fourth Amendment, however, is not a guarantee against all searches and seizures, but only those that are deemed unreasonable under the law. Fourth Amendment Explained. The Fourth Amendment guarantees protections against unlawful searches and seizures, yet the nuances of this constitutional right can be complicated. The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated. (T)he Fourth Amendment protects people, not places. The Fourth Amendment safeguards citizens from "unreasonable searches and seizures. The Fourth Amendment to the U.S. Constitution protects individuals from unreasonable searches and seizures.