The Fourth Amendment only protects against "unreasonable" searches. The case concerns the constitutional standards that apply to a warrantless search of a probationer's residence.Amendment 4: Security from unwarranted search and seizure. Amendment 5: Freedom for Life, Liberty and Property. Without a search warrant, police must have "probable cause" or at least a "reasonable suspicion" to search your vehicle. Discover your rights during an arrest in Maricopa County with our expert legal insights. Call now for a FREE consultation at 480-456-6400. Law enforcement officers in Arizona can call judicial officers or submit online requests to judges for search warrants. Reasonable suspicion requires facts and circumstances. A warrant is nothing more than a court order permitting the search.