I think this theory is very plausible. There are two things I would bet money on in this case:
1.) Everyone of the A's is implicated in the cover-up. None of them can say much of anything without implicating themselves.
2.) The one thing Casey says that I believe is true is that she dosen't know where Caylee is.
I 100% agree with both of these items. None of the A's can say anything without implicating themselves and that KC doesn't know where Caylee is!
:clap::clap: