Dr. Julieann Mitchell's take on Casey ( she hasn't examined/tested her)
http://nrs.blogtronix.net/NRS/18149
"To a sociopath,
others are always expendable: family, friends, acquaintances.
Once others have been bled dry, the sociopath moves on. Loyalty is not a part of who they are. They have no desire to change and no insight into their own behaviors and motivations. Caylee is missing, but Mom is partying and lying to both her friends and family about her daughters whereabouts.
Sociopaths are narcissistic and exhibitionistic, with
no sense of shame. Nothing exists in their world but what they want - the ultimate Me, Me, Me syndrome. They are characterized by an excessive superficiality, in both thoughts and behaviors. They are easily bored and made restless by day-to-day responsibilities, an attitude which makes consistent parenting a drag and an impossibility. Sociopaths create their own reality, and in this instance,
Caseys world did not include her daughter."