That is sad about your daughter, but with all due respect, I do not believe for one second that what this mother did was an uncontrollable thing. I mean, I believe that ANYONE that commits an act such as this is mentally ill to a certain extent. You would have to be. I do not believe that is an excuse though. If she is mentally ill enough to kill a child, she needs to be locked up. Someone with that bad of a mental illness that can kill a child and not have any recollection would still be terrified that she may have done it and at least tell someone that she does not remember and would have a fear in her that she may have done it, she would not lie to cover stuff up, do internet searches that prove that she had intent and planned it, and gone out and partied all the time afterwards. I think mental illness is used as an excuse for too many things. I had post partum depression to the point where it was almost post partum psychosis. I will admit to that now, but at the time I would not, I never believed in it. I had it during the end of my pregnancy for my 5th child, through her first year at least. So I am not downplaying it, I just think that a lot of people (for example my brother who is "add and bipolar") use it as a crutch and an excuse to not be a productive human. I do not believe this is the case with Casey Anthony, and even if she was bipolar, it will never ever excuse what she has done nor should it ever be excused for anyone who brutally plan to and follows through with the murder of a child. Someone with a severe metal illness is more likely to lash out in a heat of passion attack than a strategically planned murder of their own child.
I think she was either a) jealous that her daughter got more attention than she did from her parents and others because she seems to be an extremely narcissistic, self centered individual, or b) her daughter held her back from having freedom to do whatever she wanted. Or a combination of both.
Whatever the case, she was obviously mentally ill to kill her own child. But that will never ever excuse it, nor should it be a consideration in her trial.
I am still curious what this "half of the story" is that we don't know supposedly that the defense says there is.