A man who was taken to a Chicago hospital Wednesday after a crash with a semi-truck in northwest Indiana has died.

Tristen M. Riezinger, 22, of Crown Point, Indiana, was driving east about 4:40 a.m. when he crashed into the back of the truck on Interstate 80/94 near Calumet Avenue in Hammond, according to Indiana State Police.

He was extricated from the car and taken to Christ Medical Center in Oak Lawn with life-threatening injuries. He died at the hospital about 12:49 p.m. Thursday, according to the Cook County Medical Examiner’s office.

An autopsy Sunday ruled that Riezinger died of multiple injuries from the crash.

The 33-year-old driver of the truck wasn’t injured, police said. It was unclear what caused Riezinger to crash into the truck.