Darnell Williams was fatally shot in the Greater Grand Crossing neighborhood Sunday afternoon.
Williams, 22, was found shot in the back in the 7200 block of South Vincennes Avenue about 3:10 p.m Sunday, authorities said.
Williams, of the 600 block of West Cermak Road, died at Advocate Christ Medical Center in Oak Lawn at 5:23 p.m. Sunday, according to the Cook County medical examiner's office.
Nobody has been charged for the murder.
Area South detectives are investigating if the shooting is gang related.