The shooting happened just after 8 pm on First Street and Terrace Avenue.
Police say a 38-year-old man and his girlfriend were hanging out in a garage at the complex.
The victim told officers he heard a knock at the door, opened it, and that's when he was shot in the back.
He ran across the back alley and found a friend who called 911.
Police have not revealed any suspect information, but they believe the victim knows the shooter.