Officers responded to reports of a vehicle fire just before 6 a.m. in the 7900 block of South Ingleside Avenue, Chicago police said. When they arrived, they found a Tyler Bernicky, 25, dead on the ground with several stab wounds to his chest and legs.
His maroon van was on fire in the rear of the building, police said.
Bernicky is the son of a lieutenant in the Chicago Fire Department.
Investigators say they believe Bernicky's van was intentionally set on fire.
No one is in custody as Area South detectives investigate.
The Sun-Times Media Wire contributed to this story.