FORT WORTH -- Officials say a shuttle bus driver involved in a suspected road rage incident on the TCU campus last month has now been charged with murder.

Eric Hampton and David Mitchell got into a fight on campus while driving shuttle buses on Nov. 6. Police say Hampton fired a shot at Mitchell before ramming into his shuttle. The TCU campus was placed on lockdown during the incident.

Mitchell, 52, died a few weeks later. Family attorney Greg Kish says he sustained head trauma, severe bruising, and other injuries.

The Collin County Medical Examiner confirmed that David Mitchell, 52, passed away

“It looked like he was pretty traumatized physically," Kish said.

Hampton was charged with aggravated assault but that was upgraded to murder after Mitchell died.

A TCU spokeswoman provided this statement about his death:

Texas Christian University is saddened to hear this news, and we send our warmest thoughts, prayers and condolences to the family in this difficult time. The TCU flag will be lowered to half-staff Friday, Dec. 8, in Mitchell’s memory.

Then men were actually employed by a company called Roadrunner, which contracts out services to the university.