My Theory:
I assume the party the couple started arguing at was at ASs house, because while it is possible they were at another I find it unlikely that someone would travel to a party when they could have just stayed home to attend their own party. So, AS and her boyfriend are at her house and something triggered an argument.. could it have been that one of the 40 people who attended were unwelcome by AS or made her upset- triggered a past memory or grudge? Perhaps the new girlfriend that was mentioned on a social media comment showed up? I think that its likely that a person who made AS (or her boyfriend) uncomfortable showed up and thats why the couple left- instead of making a scene and asking someone to leave the two just left. I think that this is one of three possible scenarios. The second is that they were over the party and just wanted to go back to BF's home and spend some time alone together, but they got into an argument on the way and Adrienne wanted to go back to her friends the party (maybe because she was upset and just needed her girls) instead of staying over. The other was that her and her boyfriend started arguing, and instead of continuing it at a party in front of everyone, they decided to leave and sort things out in private. Perhaps the argument wasn't very heated at this stage and was just a small disagreement. IMO they continued to argue about their relationship and AS probably realized that her boyfriend didnt have the same feelings for her as she did for him- she wants to get away from him now: asks to be taken back home and eventually cant stand to be next to him so bails out of the car once she feels close enough to walk home safely. I really feel like this is the reason AS jumped out of the car. It would take a lot IMO for someone to do that instead of just waiting a few more minutes to arrive at home. To me she could have either been really afraid or really angry. If she was afraid I think she would have told someone and would have never decided to go back to him later in the night. That leaves anger (I know that Ive been mad enough at my boyfriend to jump out of a car to get the heck away from him, although I havent actually done it). I don't believe she was afraid, I think she was more upset and angry at whatever they had been arguing about. If she'd been drinking, this would make her more emotional, which would explain her jumping out of the car to get away, because she couldn't stand being in the car with him for any longer.
Perhaps once AS makes it back to her apartment, she realized that the person who set her off in the first place is still there; she doesnt want to be around this so opts to go back to BFs (which makes sense to me if she indeed does see him as the person she would like to spend her life with). She tries to drive herself, but the accident comes into play (and now lets assume that she was the one driving, she'd been drinking-as reported by media but "not DRUNK"- as reported by roomies, and was somehow able to maneuver the car to the back roads it was found- perhaps the tires had a slow leak and didnt actually pop), so she finds herself back at her apartment. The accident, IMO, explains the eleven calls to her boyfriend, and the previous heated arguments suggest to me that her boyfriend was done for the night and didnt answer/see her calls. I think you're spot on with this, too. If she'd just been in an accident, it makes sense that she would want to talk to her boyfriend about it. Her emotions were already heightened after the argument, so the accident could have sent her over the edge, I can imagine her being quite upset and shaken up at this point. So, AS still uncomfortable in her apartment, calls a cab. She understandably wouldn't really be in a partying mood, and after her accident just wants to go back to her BF's house and sort everything out, and be comforted after a bad night. This is where things get unclear to me
.. why the cabbie took so long.. why the calls made from her phone were exchanged the way they were (1 minute increments).. why her phone went to voicemail right after the cabbie claims to have spoke with someone.
Considering that the cabbie and boyfriend have both been identified by LE as not being POI, my attention turns to the other people who were around her that night (especially since it has been reported that not all of the party-goers have even been identified, and that LE was going to re-interview the people there).
Im thinking AS noticed the missed calls from the cab driver while still at her apartment (she was probably sitting outside- perhaps to avoid someone inside- since her roommates claim to have not noticed her). This also makes a lot of sense, she probably didn't want to be around everyone and have them all know that she'd just crashed her car. At this time of the morning, parties are usually dying off- so I think its likely that people were leaving and someone offered to give her a ride to AMPM, and she calls the cab driver back saying shell be there in just a minute. Whether she turned her phone off herself or the person driving her took it and shut it off or it ironically died, I dont know. But- to me the facts (aka shotty media reports) are pointing to one of the party-goers. I hadn't even considered this, but I think this is definitely a viable theory. That would explain why she said she was only a minute away, it would only be a short trip by car. If she had gotten into the car with someone she trusted, I believe she must have turned her own phone off - maybe it was running low on battery so she wanted to save it until she got to her BF's house where she could likely charge it. As mentioned before, it's less likely that she was picked up off the street by someone and it went unnoticed. After hearing that this is a fairly high traffic area, I'm leaning less and less towards a 'random' abduction, and more towards someone close to her (even a casual acquaintance) knowing where she is now. Anybody else thinking the same or notice holes in my theory??