Mr. Klaas, thank you for all the good work you do for families confronted with the most horrific of horrors. I admire how you've drawn on your personal tragedy--and am so, so sorry you first endured that. I can only imagine your deep pain, and wish it were not so.
The Anthony family was composed of dyads and triads that were played against one another--largely by Casey. This pairing/grouping means that no one member (other than, perhaps, Casey) was privy to all of the secrets. This served Casey very, very well over the years.
Caylee was unanticipated,but welcomed by her grandparents and adored. Despite their unadulterated love for her, there were frustrations. They'd anticipated an empty nest, and looked forward to a life without the chaos Casey created.
But the tumult only grew. Casey would not work. She would not accept full responsibility for her child. They couldn't rely on her to consistently parent the little girl they adored.
They were stuck, and of course there was some resentment about that. Not of Caylee, but of the situation.
Casey's problems began far earlier in life than anyone will admit at this point; early photographs of her show the same sort of disconnect with humans that she now has. She smiles for the camera with unfeeling eyes, she is uncomfortable in their embrace (see the pic with Shirley and Cindy).
Casey is a sociopath. The Anthony family M.O. has shifted between placating her ("Hello, beautiful"), controlling her, and benign neglect. The latter was demonstrated during Casey's absence from the home in June. In all likelihood, sheer exhaustion prevented them for pushing for answers from her--they were likely grateful for the respite from her games even as they missed Caylee. Their controlling, combative adult "child" was gone, and it was a relief. Despite the fact that they disapproved of Casey's parenting at times, they had been given no reason to believe she would harm Caylee, so they used the time as an opportunity to recuperate from the stress of living with a demanding, ungrateful parasite---even though it meant time away from their beloved Caylee.
Nothing the Anthonys did or did not do caused Casey to become what she did. Nothing they did or did not do caused Caylee's death. Their inaction in June and July had no meaningful effect on the situation--Caylee was dead long before any concern arose.
Nevertheless, the Anthonys blame themselves for Caylee's death. It came on the heels of a family argument. It came at a time when they were happy to have Casey gone from their home. They blame themselves---and the pain causes them to lash out at others. They are at an emotional breaking point, and the guilt they feel for this is likely more than most humans could bear. George, thankfully, has gotten help.
That said, the family is very, very sick. Living with a sociopath is crazy-making, and it's done the job for the Anthonys. I can't even begin to speculate about personality or other mental disorders among them until I see how they evolve with Casey out of their midst. That alone will promote their health (even if they support her in her legal battle). They will likely need more help, but I would not be at all surprised to see their lives normalizing in ways they never anticipated now that Casey is removed. She has been a long-term toxic influence.
Their denial of the horrific protects them from imploding emotionally. They will accept what they are able, as they are able---we've watched as each has had a glimpse of the true horror, and accepted it. Now they have drawn the curtains of self-protection. In time, I think George, at least--and probably Cindy--will accept the truth of the matter and go on to be productive. I think George, in particular, will find meaning. He's been marginalized by the family--perhaps with good cause (we don't really know the whole story)--and his self-esteem had taken a walloping.
Still, we do see genuine warmth and love between him and Cindy, I think. She is an angry woman (see above: living with a sociopath makes you crazy!), but much of her anger has been displaced. I suspect George bore the brunt of the angst that should have been directed to Casey.
I am not sure about Lee. There seems to be some sort of unusual sibling enmeshment, complete with...well, their own dialect, almost. I think Lee's initial eagerness to carry out his own "investigation" was rooted in little-boy-style fantasy, and he was imagining Big Bad Guys and being the hero.
I am sure they'd all prefer that there be Big Bad Guys. I think Lee is FURIOUS that there are not.
I suspect--and this is based on being the daughter of a sociopath--that Caylee was not continually subjected to abuse from Casey. Rather, she probably had periodic moments of confusion when she expected a certain response from Casey that was not forthcoming. I think it is likely that, most of the time, Casey played the mommy role at least superficially appropriately. Caylee may have spent more time watching Nick Jr. than many children, as her mother worked on her important career of Facebooking, MySpacing, texting, and talking on the phone. But in general, she was probably competently, if unfeelingly, cared for by Casey.
George and Cindy filled the emotional void for her. Caylee was loved. Casey was more of a (very) disinterested big sister to Caylee--someone who tolerated her because she had to. At Caylee's young age, this probably had not yet harmed her; as she got older, it would become devastating. (As an adult, she would likely have great difficulty trusting her own evaluations of other people--if there's one thing living with a sociopath can do, it's creating self-doubt about one's own instincts.
As for Casey. It goes without saying I think she's guilty of first degree murder. I think she is devoid of humanity, missing a critical microchip. She not only robbed those around her of real relationships with her--but worse, she worked very, very hard to create the opposite impression. She is very, very, VERY skillful at playing people against one another, as well as assuming the roles that will garner her the things she wishes to have. She is a toxic chameleon.
Caylee's death was premeditated and coldly carried out. It was not an accident. It was not the result of an argument with Cindy. The timing was chosen to best play into the family dynamic in a way that would cause the family to circle the wagons.
Her behavior immediately following the murder shows, with cold, cold clarity, the lack of feeling Casey Anthony has for others. It was movie night! Hooray!
There was little thought given to post-murder actions because Caylee's erasure was the goal. Focus was solely on the murder. Casey was not a brilliant mastermind--she was a child murderer. For this we can be grateful, because it will be what convicts her.