OMAHA, Neb. -- Authorities have identified a man critically injured in a Saturday evening traffic accident as Michael Walkowiak, 22.
The crash happened around 7 p.m. near 17th and O streets in Omaha.
Investigators say Walkowiak was westbound on O Street when his Jeep Grand Cherokee left the south side of the road and overturned.
He was thrown from the vehicle and taken to the hospital for treatment of injuries that are considered to be life-threatening.
Walkowiak was the lone occupant of the Jeep.
The crash remains under investigation.