Exigent circumstances; Plain view; Search incident to arrest; Consent; Automobile exceptions; Special needs. Under the Fourth Amendment to the US Constitution, the police are prohibited from conducting a search and seizure without "probable cause."The Fourth Amendment, however, is not a guarantee against all searches and seizures, but only those that are deemed unreasonable under the law. The Court has made clear that the exigent circumstances exception to the warrant requirement is limited to serious offenses. One of these exceptions is the community caretaking exception. There are three exceptions that embody the "community caretaking exception. The Fourth Amendment to the U.S. Constitution generally prevents the government from arresting or searching a person without a warrant. Revocation, amendment and repeal of charters and corporation laws. Exception to the Fourth Amendment's warrant requirement. —In the early days of the automobile, the Court created an exception for searches of vehicles, holding in Carroll v.