Poor Caylee. R.I.P.

So I read a few days ago about the feds saying that the childs remains do belong to Caylee. I kinda knew that they probably were her's with them being not so far from her house. I don't understand how a mother (if she was the one to do it) could look their child in the eye and kill them cold heartedly. I know we all get frustrated with our kids and get mad at them, but we don't go so overboard to harm them. I can't even picture myself doing that to Sarah.
How does one even get into that mind frame and do that? I hope she's now in heaven at peace walking hand in hand with God. It just really sickens me when any small child is killed for no reason. I really do hope that her mother gets the maximim sentance for her crimes. Man that gets me mad.