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 to the United States Constitution prohibits the federal government from conducting unreasonable searches and seizures. In Los Angeles County and throughout the United States, the Fourth Amendment provides protection against illegal search and seizure. Search and seizure law originates from the Fourth Amendment of the United. States Constitution and Article 1 of the California Constitution. In general, most warrantless searches of private premises are prohibited under the Fourth Amendment, unless a specific exception applies. Fourth Amendment Searches and Seizures ; Amdt4.3 Scope of Protected Rights. Amdt4.3. 1Overview of Unreasonable Searches and Seizures ; Amdt4.4 Probable Cause.