I haven't posted on this case, but I've been following it fairly close. I'm slightly familiar w/ the NC as well as other cult/gang factions due to being from the Tri-State area. I've spent some time working Vice and Security Threat Group (gang unit) before moving on to the Major Crimes Div.
Strictly MOO. I have, from the onset, always thought this is an Israel Keyes type killer(s). This is mostly gut, but also a little bit of an experience viewpoint. Sometimes I/we get caught up in trying to theorize/investigate very specific details while straying from the big picture. Occasionally this can lead us to spending too much time going down the wrong path. IMO, I don't see the decapitation as being a significant indicator in the "who dunnit". Again, this is strictly MOO, and it stems from my belief that this was not "personal", but more "random". "Random", in the sense that it was a "kill to kill" crime.
I believe the person(s) have done it before, had a fairly calculated plan, spent enough time learning the area and the Dermond's & their patterns. I'm not completely certain if it was 1 or 2 individuals. MO is it was 1, but if a 2nd was involved, they weren't a very "active" participant. MO is that they were eyes/ears, surveillance, muscle, clean-up, etc. I'd also say the person(s) live/work in LO, or are a friend/relative of one. Or was previously.
BTW, I'm a huge fan of Sills. Educated, experienced, hard-nosed and old school while current at the same time.
You guys/gals have some great discussion going on.
Thanks for reading.