Ok, that's possible, not likely in my view, but possible.
So let me get this theory straight:
1) JR makes 2 calls which are public, 1 to DR and 1 to unknown male who was at his place earlier when LS was there (around 12:30)
2) JR then also places a STEALTH call to JW who just happens to be awake.
3) JW then comes to get LS
4a) By then LS is deceased and now JW is the hot seat with JR so they conspire? OR
4b) JW gets LS who is in horrific shape and then she dies after leaving JR's.
(Note JW's journey is also done in STEALTH, as he nor his vehicle show up on any cameras)
Do I have that Theory correct?
My personal theory is
1) yes
2) yes, awake and trying to reach LS probably. After 3years of "saving her", and putting up with her "drug abuse" according to his parents. I don't believe he went to bed after the game and never thought once where she was, what she was doing or who she was with. I don't believe he wasn't told what happened at Smallwood shortly after it happened and what condition she was in. I think he was up waiting to confront her once he knew where she was exactly, either on the phone or in person.
3) Text or call from JR, to JW, that she needs to go back to her apt, but has no key, no phone, no shoes....and maybe "hey...she just walked out...better hurry" (maybe sobriety test story is to make him not look indifferent but was glad she left and no longer his problem)
4) in my theory LS is still alive when she leaves JRs but once her angry, jilted, embarrassed boyfriend of three years finds her, on her way to his place, sees the condition she's in, is aware of what may or may not have taken place between her and CR, he snaps, they fight. She dies.
5) how far away does he live? Are there cameras between JRs and JWs?
Did he call his father to come before he knew she was missing and reported it to police?
Let's say MB really does put black out drunk CR to bed and watched her walk her to JRs? (He tries not to look like a jerk and changes it to walked her there)
JR knows MB saying this puts her at his place last, and has to move that attention away from him, but something must have gone terribly wrong between JW and LS, and he obviously doesn't want anyone to know about drugs, alcohol to minors etc and takes it upon himself to say he saw her then, but watched her walk to the corner, alone. Knowing if he doesn't mention calling JW then JW won't mention JR's party favors. Maybe the threat at the party was a real message, "leave and never mention calling me or I'll take you down with me" Unspoken frat brother agreement but no real trust because he blames JR instead of himself for that night... maybe.
I would be very interested to know if his own apt (which would have her DNA) was searched for any sign of her clothes she wore that night. Whether his phone, facebook, iPod apps were investigated as a POI closest to her with motive? I would search the areas between 5N and JW's place thoroughly.
Just a theory mixed with what we know and what we don't.