You know, the more I think, the more this is the kicker for me. And the stop at the Williams....a last ditch call before she planned to either run away or end it all. As if she needed to hear someones voice one last time...to maybe say something, but then she chickened out. It would definitely explain her "nervousness" as explained by the Williams'.
Hi, I've been a daily lurker. Following along with all of the theories here. This is all very puzzling that is the one thing I think we all can agree on! I wonder how long the Williams' lived at this address? and who may have lived there before? There was a reason she was in this town for so long. She seemed to be looking for something or someone. But it was NOT the Interstate! Even high I believe this intelligent woman would have been able to get out of this small town. Without her phone she WAS lost and could not contact this person she planned to meet. And they could not contact her. This appears to be a planned meet that went wrong because they could no longer communicate.