UPDATE: The Winnebago County Coroner's Office has identified the father and son that were found dead in the 8800 clock of S. Main St. on Monday morning. Their deaths are being investigated as a murder/suicide, according to officials.
The Winnebago County Sheriff's Office was called to the property on Main where the two males were found in a car at the rear of the location.
They have been identified as Glen Fleener, 37, of Rockford, and Kier Kastler, 8, of Chicago. Coroner officials say they found no signs of trauma to either body.
The Coroner's Office Chief Deputy Coroner Bill Hintz says the father and mother were separating, and the son was in Rockford to visit the father for the weekend. Hintz says the vehicle in which the father and son were found had the windows sealed, and a small grill was found smoldering in the front seat while the father and son were in the back.
Hintz says he will be looking for carbon monoxide poisoning as the cause of death for the father and son.