Random brain dump:
I wonder if she used someone else's phone before she left the party in order to contact someone she didn't want traced from her phone?
Am I understanding correctly that in August of last year, she moved into a place with her boyfriend and dog, and then shortly thereafter cheated on and left the boyfriend and moved in with his best friend?
And now the boyfriend she cheated WITH is possibly cheating ON her?
Here's what crosses my mind. She appears to be someone who seeks attention. She threw away a long term relationship to be with someone who (if cheating rumor is true) wasn't worth giving up the former boyfriend for. She has an argument with him and leaves to go out with friends. She calls him 15 times after she leaves.
Is it possible she got mad and decided she would take off and disappear in order to get the boyfriend's attention? Trying to make him realize how much he would miss her? It's drastic, but hey, she's 23. Women a lot older than that do crazy things for attention!
So she uses someone else's phone at the party, possibly without them even knowing, and arranges for someone to meet her at the parking garage. The friend walks her to the garage and she walks through and meets up with her ride.
Here's where it gets fuzzy...seems like if it was attention seeking, she wouldn't have let it go on this long and put her parents through this agony. So did something go wrong with the person who picked her up?
I really should probably just put these crazy thoughts in a journal and start writing books. My ideas are usually too over the top!! But that's why I love WS, I can have wild ideas and you guys don't think I'm a lunatic.