Students and faculty are mourning the death of a Castlewood senior tonight.

Around 8 o'clock Sunday night 17 year old Tricia Sonen was driving on county road 20 when her car went into the ditch and hit a guardrail. She was pronounced dead at the scene.

Castlewood Superintendent Keith Fodness says extra counselors and clergy will be on hand to help Sonen's classmates. She was one of 23 seniors at Castlewood School.