If Casey were not responsible for Caylee's death, why would she come up with the story that ZFG had her? There are too many lies from Casey to make me think that another famly member was involved.
As far as I can recall, Tiomarie was the only person who has mentioned these woods, although reporters kept refering to friends of Casey's who said these woods should be checked.
Kiomarie has her own wacky story. She allegedly heard from Casey on July 9, and Caylee was in background, then it was a different person, Casey W., who she talked to. I don't think police were ever able to track down this Casey W., since she seems to have a knack for moving around and changing phone numbers. Also, Kiomarie's BF would not let them have his phone ... I'm fuzzy on details, but it definitely gets a vote for a re-look in my mind.