A Molalla man was found dead in his pickup about 30 miles east of Yakima, Wash. Friday night.

George L. Calkins, 58, of Molalla, appeared to have suffered from an unknown medical condition as he was driving, causing him to leave the roadway and come to a stop on the shoulder of the road, according to a press memo from the Washington State Patrol. He was traveling westbound on State Route 24 in a 1984 Ford F-250 pickup.

As of Monday, WSP Sgt. Ed McAvoy said investigators believe Calkins died as a result of the medical condition, but the coroner had not yet made a final determination. Calkins' body did not show signs of injury as a result of the car accident.

No other vehicles were involved in the accident and the pickup was not damaged.