Just watched rebroadcast of Disappeared episode - not knowing the case but having lived in an adjacent area at one time.
Looked through the threads here, reading the conflicting information about that night. The way the episode leaves the impression that Kourtne's cell phone/keys/pocketbook were in the apartment and easily found by her mother makes it suspicious that the guy who stayed over didn't notice these things as well.
That when he left, everything was on, the dog (or dogs?) were there, her phone and purse and keys with the car out front - and he just left? No note, no call/text while he was there to anyone - just left everything as is and walked out with door unlocked?
I wonder if LE were able to go over the car that she traveled in with the men, was evidence taken from the apartment (sheets, etc), Were sheets, blankets missing from the apartment?
It's a sad case. I personally am suspicious of the two male "friends". While the neighbor does seem suspicious, he seems more like a red herring - especially if the "friend" who stayed over didn't mention any further interactions with the neighbor while he was there until 7am and didn't mention seeing him outside.
7am seems like a risky time to be moving an unconscious or lifeless body. I'd be inclined to think she was taken out before that time.
While I'd be surprised that her dog didn't make a lot of noise if something happened to her in the apartment (the last disturbance the police were called to?). I'd be further surprised if she was left in the apartment on Sunday unconscious or otherwise and the dog(s) wouldn't have been completed freaked out and caused further disturbance. Being a large dog owner myself, I'd think whatever happened - happened fast with animal(s) present.
And since the possible other dog being present at the time wasn't mentioned in the Disappeared episode, that seems confusing.
If the "friends" continue to have brushes with the law, maybe the best hope will be that one will try to cut a deal with LE to get out of other charges. Either trying to give up evidence they "learned through hearsay", or maybe they'll be dumb enough to inadvertently (but possibly correctly) implicate themselves.
I hope her family and friends can finally get some answers - even if painful, instead of the unknown.