Dekota Burchard, 29, pleaded guilty on Thursday to second-degree murder in the death of Tony Rector, whose body was dumped in a Soddy Daisy cemetery.
Burchard was sentenced to serve 25 years in prison.
Also charged were Chad Edward Massengale and Roy Henderson.
Massengale was convicted of first-degree murder and was given a life prison sentence.
Henderson is awaiting trial.