Also...
When did J arrive back home? Did she call Beth at any point to see that she made it back ok? If she didn't get an answer on the cell, did she try the home phone? Or her husband's law office?
Those are good questions. I don't know when J arrived back, but I'm pretty certain she went Thursday to post flyers in Chicago.
I don't know if she tried to call Beth, but if she did not, this should be a big red flag to police, because if I dropped someone off to get on a train and travel hundreds of miles home, by themselves, at night, I would certainly check up on them to make sure they were safe on their journey. Oh, but that's right, she didn't wait around for Beth, either, she says, when she supposedly dropped her off for the train.