(Union, KY) -- A 75 year old man has died, and crash scene investigators believe icy conditions are to blame.  Tuesday night, Boone County Sheriff's deputies were checking on Walter Boyd, after no-one had heard from him since the morning.

Deputies found Boyd's pickup, overturned in a creek, in the 12,000 block of Big Oak Road.  They believe he may have driven out to the road, to pick up his mail, and lost control on a bridge that spans the creek. 

The cause of his death is yet undetermined, but the Sheriff's Office believe it was accidental.