The nearly 300 page report was released along with a 911 tape from the day Bill Sparkman's body was found.
The police record states Sparkman confided in a friend before his body was found near a cemetery, naked and partially hanging from a tree.
Lowell Adams told investigators that Sparkman had talked about his plan to kill himself.
Adams and Sparkman worked together as part-time security guards.
Sparkman reportedly told Adams he planed to kill himself, that he wanted it to look like murder and that he'd been practicing asphyxiation.
Investigators say Sparkman staged his death because he thought he had cancer and wanted his son to receive a large sum of life insurance money.