I've thought about what you have said here. I wonder if everything is always so black and white: Do sociopaths NEVER have feelings unless it has to do with themselves? I know that sociopaths are great manipulators and I saw tons of that in the jail visits. However, when casey seemed reluctant to meet her mother's eyes in the first visit and cried when she did lift her eyes up, that pointed to a feeling of guilt to me. Sociopaths are not supposed to feel guilt at all and can meet your eyes with a soulless stare. (Her statement to her brother about being an evil b*%#h also smacks of guilt to me).
Also, I did see moments where she seemed to feel badly, not much, but some, for what her parents were going through. It did always come back to casey, but I did see some of that and I'm not sure all of it was artiface or manipulation due to the context and wording.
I acutally also thought casey felt some emotion talking about Caylee with her dad. When she spoke about how Caylee is the best of everyone in the family, etc. Of course, this is not the same kind of emotion a normal person would feel. A normal person would lose thier mind in jail with their child missing on the outside. Not knowing if they are cold or hungry or crying for mama or even if they are alive. Nevertheless, I did see what I thought was some emotion - some sense of fondness for her child and maybe even some regret that she won't see Caylee again. Perhaps casey has some sociopathy and also something else, like what some other murderers of wives and children have who looked like they really loved their kids or wives but felt their was no way out but to kill them. I'm thinking Mark Hacking, for example.
Anyhow, regardless of what is wrong with this creature or whether she indeed has something real deep down inside her, I feel she does not deserve to dishonor Caylee by attending her funeral. She took away that child's life and took the happiness away from the entire rest of her family at the same time. The extended Anthony family's lives have been totally ruined by this.