Authorities have a mystery on their hands after a semi truck driver is found dead in Tulsa.
The semi had been parked on the side of I-44 at Darlington in Tulsa since about 7 p.m. Monday.
The truck was still running with the lights on when around 2 a.m. Tuesday, a woman opened the door and found the driver dead.
The unidentified victim is in his 40's. But authorities aren't sure how he died.
Police say there are no signs of foul play.