The Waterloo Police Department and Monroe County Coroner’s Office investigated the death of a 61-year-old man in the 200 block of Columbia Avenue.
Police and EMS were called to the residence on Friday afternoon.
An Illinois State Police crime scene unit was requested to assist at the scene.
On Sunday, Monroe County Coroner Bob Hill identified the deceased as Barry Wetzler of Waterloo.
“We have determined that the death was a result of a self-inflicted injury,” Hill said.