I'd be willing to bet that, IF she is ever charged with 1st degree murder, she'll "find" the body in exchange for taking the DP off the table. More than once that has worked (Green River Killer comes to mind, Ted Bundy tried it too).
Most of his motions will be dismissed on a technicality, because LE will say they don't pertain to the bounced check charges & the child neglect charges. They're evidence for the next set of charges (murder) and he'll get that information once that is filed.
Lie detector tests aren't admissible anyway, so he most likely won't get those either.
I'm sure she doesn't have a passport, so leaving the US isn't likely. Even if she DID have one, it would have been part of the bond to surrender it. I think she's just wanting to get her last taste of fresh air before she hits prison.
Either that, or she's just jonesin' for some Bubbalou's Bodacious BBQ (in which case I say yeah, let her go get some of that!!).