Under the Fourth Amendment, a police officer may only use such force as is objectively reasonable under all of the circumstances. The Fourth Amendment protects your privacy – specifically, "in their persons, houses, papers, and effects.The Fourth Amendment prevents the police from stopping you and searching your person, home, or car unless certain criteria are met. 6. May passengers routinely be directed into or out of MV? No, not under the Washington constitution (Yes, under Fourth Amendment). The Fourth Amendment prohibits the United States government from conducting "unreasonable searches and seizures. But cracks in the Fourth Amendment have weakened our personal security. What rights are protected in the Washington State Constitution? Watch Now: Defense Strategies for Getting (and Challenging) Social Media Evidence. In the course of their daily duties, police officers may observe contraband in plain view.