Casey thought about killing someone in that house for a while. Whether it be Cindy, George, Caylee... it will never be known. She told friends she would be getting her parents house and tried to get Cindy to kick George out. She wanted freedom but refused to go out there, live life and earn it. She was more of a leeching parasite. She didn't follow through with killing someone until she felt her hand was forced and that would have been when Cindy threatened to take custody of Caylee and throw Casey out for stealing from her grandmother and lying. People at Cindy's work testified to Cindy talking about getting custody so someone wasn't this great mommy everyone wanted everyone to think she was. There was a huge fight in the Anthony home the night before Caylee went missing and if you read both Cindy's and Casey's Myspace posts you will see, Casey killed Caylee to hurt and punish Cindy. She would rather kill her daughter than let her mother get custody. The family dynamics are quite odd in that household. George is basically a **** on, same with son Lee. Casey runs the show followed by Cindy but when everything hit the fan Casey had no choice but to let Cindy take control and she hated every minute of it. If you read the secret jail letters passed between Casey and Robin, Casey does nothing but ***** about the attention her mother is getting, the clothes she brings her, basically Cindy can do no right but at the same time this is the same woman that believed what her lying daughter fed her and supported her through this whole thing. Her father see's her for what she is, he wanted her to serve major jail time and he has nothing to do with her. Can't blame him after losing his grand daughter and being accused of a horrendous crime as molestation and rape of his own small child. As a victim of which, I don't doubt it may have happened to Casey but not by George.
Anthony's lawyers tried to get her to take a plea deal of about 20 years, I believe in the middle of the trial but she refused, rolled the dice and ultimately beat the system. Getting away with killing a helpless child is one of the reasons she is one of the most hated people in America.