Deputies suspect a drug overdose may have contributed to a crash on M-28 in Dafter Township early Saturday morning.
According to the Chippewa County Sheriff's Office, Patrick Brian Obeshaw, 55, ran off the road into a parking lot and hit a parked semi-truck.
Deputies said Obeshaw sustained life threatening injuries and was taken to Saginaw for treatment.
They suspect a drug overdose may have contributed to the cause. The crash remains under investigation.