The ways in which Kenneth's death is unlike the others make me think that he might be the clue to this whole thing.
It's interesting to think about KR relationship to these people, locations, and event, isn't it? Maybe we could discuss the differences and similarities? Off the top...
Differences:
- location: Left Fork Road(KR) vs. Union Hill Road
- time body found: afternoon (KR) vs. morning
- who discovered bodies/called 911: DS (KR) vs. JM/BJM and friends
- injuries: single gunshot wounds (KR) vs. multiple gunshot wounds and in some cases blunt force trauma
- crime scene details reported from family interviews: cash on body (KR) vs. open windows (CRSR & FR)
- children on site: no kids at KR
- animals on site: no chickens/pigs/hunting dogs at KR
Similarities:
- cannabis grow ops found at multiple locations including KR garage
- hobbies: derby cars
- property ownership: owned by same family members (I believe? Please correct if I'm wrong)
- property improvements within the last few years: garage at KR, pole barn at CRSR
- animals on site: dog(s)
- recent temperament: social media posts from multiple victims in the recent past may denote a sense of unease and DS reportedly described KR as "paranoid about security"
- supposed plans: DS/KR working on cars, GR in town to help CRSR help work on cars
Due to the similarities part, my opinion is that this crime is related to the grow ops most probably, but very possibly some of the cars were part of the larger money operation going on as well. Due to the differences, I don't think it was due to cockfighting, custody of the surviving young children who were present during the murders, or any kind of sudden violent event near CRSR home. I also do not personally think that GR was in the wrong place at the wrong time: I believe he was a target as well.