Rolling Meadows police responded to the 4700-block of Arbor Dr. after a 911 call about an unresponsive man. Police found the victim, Fidel Bahena-Aguilar, dead.
The death has been ruled a homicide by the Cook County medical examiner. Police say a preliminary investigation revealed that the victim was in a physical fight with his brother, Bernardo Bahena-Aguilar early Tuesday morning.
The brothers lived together, but Bernardo Bahena-Aguilar is believed to have fled out of state, police said.