I know you weren't asking me, but I don't think she's crying. She has only cried for herself on a few rare occasions and I don't think she really felt anything then. I think she's still going through the 'pity-me-don't-you-understand-what-i'm-going-through' phase... but I don't think she's literally crying about it.
When we have seen her cry, she wipes them with her fingers, and looks at them like 'wtf are these'.
She is devoid of any emotion. She's not sad, mad, glad.........she's not anything. She's empty.
I respectfully disagree with this. Sociopaths feel. They feel mad, glad, sad, annoyed, irriatated, afraid (though not much fear as most of us can), jealous, concern, etc. They just don't feel those things for anyone else but themselves. I'll go further and say that the issue of socipathy is not completely black and white. There may be degrees. For example, although I do not believe these types feel actual love for another, because that takes being able to put themselves in the shoes of another, to feel empathy, etc, I do think they are capable of feeling a fondness for their kids or parents, romanticize relationships in the sense that they may believe they care for their significant other (even when they don't) and romanticize or feel fondness about places, things, like their house or certain food, and so on.
In the case of almost all sociopaths, they know there is something different about them and they report feeling empty, at times. But they often feel, from what I have studied, that the guilt feelings, pity, empathy and concern that others display, is either false, or a sign of weakness. They must know somehow that these feelings actually exist in other, though, otherwise there would be no reason to emulate those feelings. If they truly believed that everyone felt the way they do, there would be no logical reason to act like they care about anything other than themselves because no one would care about such feelings or know such feelings actually exist. I think that sociopaths generally feel they are better, stronger and smarter than everyone else and that only fools or weaklings actually feel the things that define us as human.
In casey's case, I do believe she had and even may have some feelings for Caylee and her brother and parents. I think she has a nostalgic feeling for her parents due to her role as their princess and how comfortable she was with what they provided and how they likely always protected her from herself. I believe it is possible that she tears up at the sight of them and what she has lost, although she never had all that normal people do, due to her defective soul. I also think she felt for her daughter and may still feel for her in some way, shape or form. Probably in more of a possessory fashion. It's likely that casey saw Caylee as part of herself, but not an indispensible one, so she had the right to get rid of that part of herself. I think she may have enjoyed Caylee at some times, when the baby was being especially cute, for example, and I don't think it is impossible that she even misses her now and then.
But any trace of feeling she may have or have had towards anyone else was always tempered by other, more dominant feelings. Thus, if she has twinges of remorse when she sees her parents, or fear that they will be able to read her, she also feels great anger towards them, blames them in larger degree for her "predicament" and spends time reveling in the power to punish tme by withholding contact or even the acknwoldgement of their presence. Likewise, if she did indeed enjoy Caylee at times, her possesory feelings, and also probably feelings of anger towards the child, and a feeling of being "trapped" by her baby, allowed her to shove aside any residual feelings she may have had for Caylee such that she could snuff out her life.
Normal people are appalled, disgusted and confused by the likes of casey. We often have to act as if they have no traces of humanness at all, in order to process the fact that a mother like her, could actually destroy the best thing that ever happened to her. But I think the psychology is much more complex than "She's completely dead inside, like a shark".
Otherwise, there would be no reason to place a heart sticker on the tape she placed over the child's mouth. It was, I believe, a sign that a monster like casey is much more horrible than we actually can bear to believe. Because, she
can feel things and thus must know that others will feel and suffer, as a result of her actions. She did what she wanted regardless of knowing it would cause pain to those that loved her baby and to Caylee herself. As she suffocated or drowned or did whatever she did to her child, she recognized the universal signs of extreme panic, distress, the will to live, the need to breathe, the fear and the sorrow as the one who was supposed to love Caylee best, watched her struggle to survive and nevetheless fought to end her life. That casey
can feel makes her that much scarier to me.