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U.S. Supreme Court Rules Unanimously for State in Traffic Stop Case

(Phoenix, Ariz. – Jan. 26, 2009) The United States Supreme Court today issued a unanimous decision in favor of the State in the case of State of Arizona v. Johnson. The Supreme Court held that a police officer may conduct a pat-down search of a passenger of a vehicle following a lawful traffic stop if the officer has reasonable suspicion that the passenger is armed and dangerous. The ruling reverses a 2008 Arizona Court of Appeals decision.   

“This is an important decision that reaffirms the authority of police officers to take reasonable steps to protect themselves during traffic stops,” Attorney General Terry Goddard said. “The Court appropriately recognized the authority of a police officer to conduct a pat-down search for weapons if the officer believes the passenger is armed and dangerous.” 

This case involves a valid traffic stop for a registration violation and a pat-down search of the backseat passenger.  Although the police officer lacked sufficient grounds to believe that the passenger was committing or had committed a criminal offense, the officer reasonably believed that the passenger might be armed and posed a safety risk. 

On April 19, 2002, police officers who were members of the state gang task force were patrolling the “Sugar Hill” area of Tucson, which was known to be a Crips street gang neighborhood.  One of the officers ran the license plate number on a vehicle traveling on a major street bounding the Sugar Hill neighborhood, and the plate number came back with a mandatory insurance suspension, a civil infraction warranting a citation.  The task force initiated a traffic stop of the vehicle.  The vehicle had three occupants – a driver, a front-seat passenger and a back-seat passenger.   

While Officer Maria Trevizo approached the vehicle on foot, she noticed Johnson, the back-seat passenger, look back at the police vehicle, say something to the people in the front seat, then continue to look back at the police vehicle. While the other detectives contacted the front-seat passengers, Officer Trevizo approached Johnson.  She asked him for identification. She noticed that he had a police scanner in his jacket pocket.  She also noted that he was wearing colors associated with the Crips gang. Johnson told Officer Trevizo that he was from Eloy, a town in which Officer Trevizo knew that the Trekkle Park Crips were the predominant street gang. Johnson also told Trevizo that he had done prison time for burglary and had been out of prison for about a year. 

Officer Trevizo asked Johnson to exit the vehicle, intending to talk to Johnson away from the other passengers to gather intelligence about his gang. Once he got out of the vehicle, Officer Trevizo asked him to turn around so that she could pat him down. She testified that she patted him down because the information she had obtained gave her reason to believe that Johnson might have a weapon.  When she conducted a pat-down search for weapons, she found a handgun. Johnson was arrested and subsequently convicted for possession of a weapon by a prohibited possessor and possession of marijuana. 

The legal issue concerns whether the pat-down violated requirements of the Fourth Amendment. In a divided opinion, the Arizona Court of Appeals reversed Johnson’s conviction because it concluded that the pat-down search was not permissible in the circumstances of this case. The Arizona Supreme Court declined to accept review, but the United States Supreme Court subsequently granted certioriari. 

Assistant Attorneys General Joe Parkhurst and Kent Cattani represented the State at oral arguments before the Court on December 9, 2008. For additional information, please contact Anne Hilby at (602) 542-8019.