I've been following this thread for a while but haven't posted anything until now.
IMO, the person who sexually assaulted and killed Richard Sweeney, the 8 year old, is not responsible for the murders of the other two young men. It's a different MO, with the body left covered up in the barn loft, not left outdoors. There was not the brutality to the body that appears in the second murder.
Jeffrey Burkett was found with his hands tied together over his head. He had been sexually molested, beaten and dragged through the woods. Some reports say he suffered surgical style incisions and was tied with barbed wire. This was a very brutal assault.
Donald Abell was missing two weeks before his body was found. His hands were tied, and he had been beaten. He died of a skull fracture. Oddly enough, his shoes were missing.
I think it's possible that Donald Abell sexually assaulted and killed Jeffrey Burnett, and some people in the community may have suspected as much. Abell's murder sounds like vigilante justice - his hands were tied, and he was beaten, but he was not sexually assaulted. Rather than turn him over to the police, someone decided Abell didn't deserve to live.
This is only wild speculation on my part, but it would explain why Abell's family wants no investigation into his murder, and why others who ought to know something are unwilling to talk about it.
Does anyone else think this is a possibility? Or am I way off track??