No, not every search conducted without a warrant is illegal. If you or another authorized individual consented to a search or if law enforcement had enough cause, any evidence seized, or arrests made will likely stand. Other circumstances in which a warrantless search is legal include emergencies, impounded vehicles, and situations in which evidence is in plain sight. Police can also search a person and their immediate surroundings after an arrest to ensure there aren’t weapons present that could pose a threat to officer safety.