Detective? You mean Sheriff.
The cult still exists both inside the prisons and outside. In fact some LEO have been or are members.
As far as mistaken identity, we are not talking about the smartest bunch that might do their homework and double check. 1) I suspect Sheriff Sill's property records are sealed and as such, he was not easily tracked to his home. 2) RD had a brief encounter with someone at the Publix where the video was collected. The person he spoke to has never been identified. The encounter is so very brief that it seems apparent this person is a complete stranger to RD. Perhaps the person addressed him as "Sheriff". The only discrepancy is the mustache. Did RD have a bit of fuzz that day? We don't know. But the resemblance is undeniable.
The Nuwaubian Cult theory is one possible motive, but I don't think it's any stronger than several others that've been kicked around (well, maybe the "mob hit of RD who was in the witness protection" one..)
Family is also a possibility, and a random serial/thrill killer is not out if the question. Hell, it could even have been a GW / Reynolds golf club/community employee or a contractor who felt disrespected by one or both D's and held a grudge. Same goes for GW community neighbors/residents - even somebody from the D's church.
But back to the Nuwaubian Cult. Malachi York certainly hated Sills, and York had (and has) nothing to lose. There's likely to be former NC members floating around in the Putnam, Jasper, Morgan, Oconee, Greene, and Clarke County areas (and maybe even over towards Augusta). One or two could have taken an assignment from MY, or they could've come up with the idea on their own.
For that matter, maybe it was somebody else who Sills put in jail/prison while employing a little too much Buford T Pusser attitude. What about the pine straw guys? If I were one of them, Sills would definitely not be on my Christmas card list..
The biggest problem I have with the Nuwaubian Cult theory is that Sheriff Sills is still alive. If the cult was involved, I refuse to believe that they would just say: "Dang, wrong guy. Oh well".
No, I think they would have kept after Sills until they got him. If you hate somebody bad enough to behead them and take the head with you and murder their spouse and try to sink her body in the deepest part of the lake, you hate them enough to keep after them even after finding out that your first attempt was a case of mistaken identity.
I live an hour and a half away from Oconee, and know several people who live in Great Waters and in the other nearby Reynolds Plantation developments. I've played golf there many times. This crime shook all of Oconee. Such things just didn't (and don't) happen there. Ever.
I have followed this case since it first hit the ATL news. I'd put it in my top 5-6 WS cases that I'd most like to see solved - like, solved right now. It's been way too long. I have great disdain for Sills, but bashing him won't help solve the crime. I hope that the FBI can solve this case via DNA and possibly genetic genealogy and obtain some measure of justice for the Dermond's and their family.
All jmo