I think there are lots of things we don't know and of course it is good to hold back info, as we all know and can respect.
Good question tho, to as why would an abductor take the cell-phone from her condo.
Personally, I believe Jennifer may have gone out that night to mail the phone. We all seem to be divided on that theory.
She might not have wanted to take the time in the morning. Possibly not wanting to be late for work. I wonder if she was late for work on Monday, when she returned from her trip, if so, she wouldn't want to be late again. Then there is always the chance she could've mailed it from work too. Maybe. Maybe not.
The damp towels are puzzeling tho, but who knows how long it would've taken them to dry and the water left there (LE wasn't convinced of the drying time), and she could've showered that evening and left her make-up and all on the counter when un-packing. Boy I dunno. It's all so sad.
I just pray she is found and can come home ALIVE!