(Arlington, WA)  --  Police say a Good Samaritan who was helping a child following a suspected DUI-related crash in Snohomish County, Washington is dead .  The Washington State Patrol says the woman stopped Saturday night on Highway 530 to help the nine-year-old girl at the crash scene, about three miles east of Arlington, and was hit from behind by a car while she carried the child from the site of the crash.  Troopers say 46-year-old Trina Morgan of Darrington died at the scene, and the girl suffered an ankle injury.  Police haven't identified the driver of the car.