Wolf was pronounced dead at the scene. Watts and a passenger in his tractor-trailer were not injured. Everyone was wearing a seat belt, troopers said.
Fay Baker, 90, of Crawford, Ark.
Baker died Wednesday from injuries she suffered in a wreck Sunday on I-40 in Caddo County.
She was a passenger in a pickup driven by Nancy Baker, 73, of Crawford, Ark. About 2:50 p.m., their pickup and a second one driven by Ronald Squires, 41, of Weatherford, were both heading west on I-40 when Squires' pickup hit Bakers' pickup from behind, troopers said.
Bakers' pickup hit an exit sign, then ran through a fence, coming to rest in a wheat field. Squires told troopers he fell asleep at the wheel.
Fay Baker was taken to OU Medical Center, where she died Wednesday. All involved were wearing seat belts.