A warrant is nothing more than a court order permitting the search. Arrested for illegal search and seizure?Phoenix Search and Seizure Attorney Howard Snader can help! The Fourth Amendment only protects against "unreasonable" searches. Without a search warrant, police must have "probable cause" or at least a "reasonable suspicion" to search your vehicle. An exigent circumstance is an exception to the Fourth Amendment's protection against warrantless searches. The case concerns the constitutional standards that apply to a warrantless search of a probationer's residence. In Arizona, police officers need probable cause to search your vehicle without a warrant or your consent. The Fourth Amendment of the United States Constitution protects a citizen against an unwarranted invasion of privacy and illegal search and seizure. The Fourth Amendment of the United States Constitution protects a citizen against an unwarranted invasion of privacy and illegal search and seizure.