The Fourth Amendment's rule against unreasonable searches and seizures mean the police cannot search you or your vehicle unless one of the following is true. Probable cause is present when the police officer has a reasonable belief in the guilt of the suspect based on the facts and information prior to the arrest.The Fourth Amendment to the U.S. Constitution protects you from unreasonable searches and seizures. 1. Please call today at (916) 498-8460 for a free consultation to go over the details of your case. The Fourth Amendment protects the right to be free from unreasonable searches and seizures. (U. In most states a licensed driver arrested for a DUI gives consent to testing. Find out how a MO man challenged this rule in Supreme Court and won. Planning entitlements, design review, zoning and future development services. The Fourth Amendment requires probable cause for law enforcement to search vehicles, aiming to prevent unreasonable searches and seizures. The 4 th Amendment to the US Constitution guarantees freedom from unreasonable search and seizure.