A fatality accident occurred Tuesday morning in Caldwell County.  According to the Highway Patrol report, the accident happened as Donald Davis, 72, of Plattsburg, was driving a grain truck eastbound on M-116, five miles east of Lathrop, when he crossed the center line and struck the guard rail. The vehicle then went over the guard rail, down an embankment and overturned.  The cab of the truck detached and came to rest on its top in a creek.  Davis was pronounced dead at the scene.