According to Catoosa County Sheriff Phil Summers:
Deputies were called to the residence about 6:49 p.m. for a death investigation. Camp-bell’s body was found in the back yard.
He could not be revived and was pronounced dead at the scene.
Based on a preliminary investigation, authorities believe Campbell committed suicide by carbon monoxide poisoning. Investigators found no signs of foul play.
The investigation is continuing, including toxicology results.