emergency personnel were never able to locate a collision at the location, the Highway Patrol said.
^^^^^^^^^^^^^^^
Fell asleep while driving.
The day before he left, he told his son or neighbor that he was going to take his other car because he was having problems with this car (the white car) and I swear it was something about a tire.
Skid marks going off the road into the creek. Typically if you fall asleep at the wheel you will wake up as you go off the road and you won't have much time for slamming on the breaks within your lane.
It looks like they were hit either by a deer or a vehicle and lost control.