Tony Ervin was stabbed to death Friday night in the Chicago Lawn neighborhood.
Ervin, 28, was stabbed during a fight at his home in the 6000 block of South Sacramento Avenue about 10:30 p.m. Friday, authorities said.
Ervin died at Advocate Christ Medical Center in Oak Lawn at 11:11 p.m., according to the Cook County medical examiner's office.
Area Central detectives are questioning a person of interest, but no charges had been filed as of Saturday morning.
Area Central detectives are investigating.
-- Sun-Times Media Wire