A man driving near downtown found the body of the victim of an apparent hit-and-run .
The man saw the body around 3:45 a.m. Sunday near Commerce and Mesquite.
Police say he went to a nearby fire station to get help.
They say the victim appears to have been hit by a car, and might have been a homeless man.
Investigators say they have been unable to find anyone who say a vehicle hit the victim.
His name had not yet been released.