TUCSON, Ariz. (KGUN) — Pima County Sheriff's Department says it is looking into a downed aircraft. The FAA will release the aircraft tail number once investigators verify it at the scene. According to Tucson Police Air, a police helicopter assisted in the search for the overdue aircraft. #AIR2 assisted local Air Traffic Controllers search for an overdue aircraft, last seen SE of Kitt Peak. We located a downed aircraft, landed to search for survivors and unfortunately located none.