The fire happened early Thursday morning at the Horseshoe Inn in Schiller Park. When firefighters arrived, they did a search of the building and found the body of 67-year-old George Markopoulos.
An autopsy found that he died from blunt trauma and that his death was a homicide.
The Cook County medical examiner's office confirmed Monday that a second body has been found.
Police and fire officials are not commenting.
