by itself furnish such grounds. In United States v. Mendenhall (1980), the Court held that a person is seized only when, by means of physical force or show of authority, his freedom of movement is restrained and, in the circumstances surrounding the incident, a reasonable person would believe he was not free to leave. Under Torres v. Madrid (2021), a person is considered to be seized following the use of physical force with the intent to restrain, even if the person manages to escape. In Florida v. Bostick (1991), the Court ruled that as long as the police do not convey a message that compliance with their requests is required, the police contact is a "citizen encounter" that falls outside the protections of the Fourth Amendment. If a person remains free to disregard questioning by the government, there has been no seizure and therefore no intrusion upon the person's privacy under the Fourth Amendment. When a person is arrested and taken into police custody, he has been seized (i.e., a reasonable person who is handcuffed and placed in the back of a police car would not think they were free to leave). A person subjected to a routine traffic stop on the other hand, has been seized, but is not "arrested" because traffic stops are a relatively brief encounter and are more analogous to a Terry stop than to a formal arrest. If a person is not under suspicion of illegal behavior, a law enforcement official is not allowed to place an individual under arrest simply because this person does not wish to state his identity, provided specific state regulations do not specify this to be the case. A search incidental to an arrest that is not permissible under state law does not violate the Fourth Amendment, so long as the arresting officer has probable cause. In Maryland v. King (2013), the Court upheld the constitutionality of police swabbing for DNA upon arrests for serious crimes, along the same reasoning that allows police to take fingerprints or photographs of those they arrest and detain. Exceptions The government may not detain an individual even momentarily without reasonable and articulable suspicion, with a few exceptions. In Delaware v. Prouse (1979), the Court ruled an officer has made an illegal seizure when he stops an automobile and detains the driver in order to check his driver's license and the registration of the automobile,