I have gone through all of these threads and have come up with the following thoughts. These are just opinions and I may be off base on some of them.
1.) The killer(s) were most likely in all of these homes probably as a guest, especially DR's place which looked like it had attached rooms.
The killer would need to know who slept where in order to finish the murders quickly before any of them could react.
2.) I am leaning to a single killer pulling this off. Multiple killers would carry a lot of risk, especially if one of them made mistakes.
3.) The killer would be considered very smart by most people that know him. What I mean with this, is that he is capable of learning things on his own.Probably introverted and capable of making a complex plan that would seriously confuse the subsequent investigation.
4.) Someone needed to be killed in order to advance the killer's agenda, be it a cover up, robbery, or other. I'm not set on any particular agenda yet.
5.) This one is from a really dark place in my mind. Most of the victims could be part of a plan to misdirect the investigation. Lot of victims = lot of potential motives. FB threats out there that are similar to what happened, all kinds of other drama like road rage, demo derby feuds, etc. My reasoning behind this is that if the main target(s) were the only one(s) killed, that the motives would be a lot more apparent.
The different MO for KR fits into this theory.
6.) The killer probably made a few mistakes, especially at CRsr's place and possibly with KR.
7.) The killer is obviously a psychopath (you would have to be in order to murder 8 people), but you may not ever suspect it if you know him.
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