As I take in this new information from the last couple days, I'm trying to eliminate all prior opinions I had formed with the limited information that we had in the beginning of this case. I'm trying to start fresh and this is what I've come up with...
I am at 80% with the neighbor, 15% the overnight guest and 5% other. Why? This is why...
I'm not going to try to make up a motive for the overnight guest. With the information that we have, the only person who would have a motive is the neighbor. KS was getting extremely physical with the neighbor and by CP's account, KS's anger with the neighbor did not diminish. She was arguing/fighting downtown with people, then comes back home and fights with the neighbor. It sounds like she was on a mission to fight. There is no motive for the guest that anyone knows of. People can speculate a sexual motive but you're really just pulling things out of thin air. Getting into a car accident which causes serious injury to someone else doesn't exactly go hand in hand with getting violent with someone for not having sex with them.
People can also speculate on drugs all they want, but are there drug charges on either the guest or his friend? What about KS? KS's boyfriend was taken to prison, his history with the law does not pertain to this.
Here are some facts that we know:
Kortne got into a physical altercation with the neighbor at 3:00 am. She kicked him and even swung at him.
The guest tried to get in between KS and the neighbor. It's reported that the guest also made hostile remarks towards the downstairs neighbors. One could assume that the guest and KS were BOTH upset at the same people for the same reasons.
23 minutes afte police left, a 2nd call was made. "According to Kortnes father and neighbors, Saksek called police after Kortne stomped on her apartment floor in anger."
It sounds like it's all but certain that KS was stomping in anger. It wasn't the guest just making that up as an excuse for the noise.
Shortly thereafter, the guest claims that he went to sleep. At this point in the case, I wouldn't see why he wouldn't go to sleep. But it sounds like KS just wasn't letting anything go that night. She fought with the neighbor(s) because she thought that they were responsible for her boyfriend getting into trouble earlier in the day. After fighting/venting her anger and the police being called, she still didn't let it go because she was stomping in anger towards the neighbor. It sounds like she just didn't want it to end.
IMO, KS waits for the guest to fall asleep so she can handle this issue on her own without him stepping in between it like he did last time. The neighbor is obviously fed up with the way she's been acting. She's kicked, swung, stomped already and the cops were there TWICE. With a simple assault charge already under one's belt, there's probably not much more that a person with a record like that could take. ESPECIALLY when someone continues to come after you physically.
There's a history of violence between the neighbor and KS. There's a history of violence on the neighbor's record.
I just don't see how the overnight guest goes from being on KS's side, making hostile remarks at the neighbor(s) and stepping in between KS and the neighbor to all of a sudden getting violent with the person he was on the same side with.
Keep it simple...look at the facts. There was physical violence hours before KS disappeared. I think we need to keep our heads focused on that. I haven't looked at a ton of cases but let me ask someone this. How many cases of missing persons are there where there is physical violence with someone within a few hours of when the missing were known to have disappeared, but that altercation had nothing to do with their disappearance??