magic-cat
Mother to Many
I do think that since Casey had used "the nanny" as an excuse to her friends during June/July, when push came to shove (night of July 15th) it was someone she could lay the blame on, and she knew they would never find this nanny, because none existed. I would be interested to know exactly how much time she invested in this nanny the kidnapper story. The following is part of the Brace profile that was done on Casey. It's a pretty interesting read, there is more on her profile at the link.
Based on her BRACE Character Profile, Casey Anthony is self-centered, self-justifying and self-promotional. It is all learned behavior, but there appears to be some type of memory dysfunction, not a matter of not knowing the difference between the truth and a lie, but rather not caring or not expecting to be caught or held responsible, perhaps aided by episodes of acute substance abuse. There is a semblance of confabulation and indifference to others or the truth, but there is something else.
There is an intentional quality to her indifference, a deliberate manipulation of others, a calculated purpose that affords her some type of personal reinforcement.
http://crimsonshadows.net/content/view/168/140/1/1/
Thanks for the link. Having read through the entire thing, I can only determine that the profiler believes Casey to be a Psychopath(a Sociopath by another name). Another brick in the wall...