Authorities have identified the man who was found dead late Tuesday afternoon along Highway K just south of Plum Ford Road.
A report from the Missouri Highway Patrol identified the man as Frank E. Carwitz, 76, of Sullivan.
The patrol stated that Carwitz was driving a 2009 Bonneville Triumph motorcycle south on Highway K a few miles south of St. Clair at 5:05 p.m. Tuesday and had just passed the Plum Ford Road intersection when he suffered some kind of medical condition. The bike traveled off the right side of the road and through the yard at 2975 Highway K.
A passerby saw the man and the bike in the yard and called 911. St. Clair Ambulance District personnel arrived on the scene and pronounced him dead at 5:20 p.m.
The emergency responders had said at the scene that it did not look like Carwitz had suffered traumatic injuries. He was wearing a helmet.
The man was on the ground immediately next to the motorcycle.