I was thinking that she did send her away and she was suppose to meet up with her later when things "died down". I think they babysitter story was to get the trail off Casey and she thought that everyone else believed her lies up till now,..why not police,... just a thought that ran through my mind.
Casey is supposed to have stolen $700 from Amy. Is that rumour or fact?
If it's true, perhaps she used that money to send Caylee away.