I think "cooperating" is a bit of a stretch, but she has been interviewed by the police, per the affidavit (par. 17) and had her home searched (same source). So they did "catch" her once. The detective didn't mention her lying and saying she didn't know any such people, for example; a low bar I know, but someone with the initials "CD", recently has not cleared that bar.
...
Well, Tylee's aunt Annie is a Ryan (father's side of the family), and she is involving herself as much as possible, so there's that.
One pair of JJ's adopted and Tylee's natural grandparents are the extremist Coxes, so it makes sense they're not saying anything either.
. Other than that, I don't know.