Theory of course...Maybe it was Cindy? Nah..
Casey came home to change into her party clothe expecting Cindy to watch Caylee, and the heat turned up when Cindy confronted Casey with the lies and money she had stolen. Casey attacked Cindy verbally and put the blame on her for being such a bad mother and role model. Cindy lost control and attacked Casey with the force from the devil. Caylee started crying over all the yelling and fighting. :waitasec: Wonder if the neighbors heard any screams from the home?..Seeing her mommy on the ground with Cindy strangling Casey until she turned blue. Caylee jumped in to help her mommy and as she did, Casey got lose and the started attacking Cindy. In the middle of the brawl Caylee was being tossed side to side and ended up being held hostage in front of Cindy's eyes. Casey threated to kill her right then and there If Cindy took another step closer to her. Casey already was plotting killing her mother, but this fight made her plans take a different turn.
She told Cindy if she called 911 she would press charges on her. While having Caylee under her arm, carrying her out to the car Casey had already lost it. She knew the best way to get back at her mother was to get rid of her mothers most precious possession. Caylee. This family is very dysfunctional and it was all about who had the most control between the two female Anthony's. Casey later killed Caylee and told Cindy she would blame her if she would ever tell.
Or Cindy accidentally killed Caylee and told Casey that she was going to blame her. That if Casey didn't follow the script she would be the one charged with murder. And so the script was written and followed. 31 days later after they all were into character, they reported Caylee missing. They lost their granddaughter and didn't want to admit that they had a murder in the family. That would tarnish their image.
Do I buy it? H*ll no! But at this point if it were not Casey, it was Cindy. And even thought IMO it was Casey, I feel that Cindy and George helped cover it up after Casey came home with a dead Caylee in the trunk.