I don't even like children and I can't conceive of anyone wanting to kill her. And it's obvious her grandparents simply adored her; if Casey didn't want to be a mom, all she had to do was leave Caylee with them. I think that's what bothers me the most, the killing was absolutely senseless.

In reading the thread Maddie mentioned above, I saw someone write that "Zanny" (the name of the mythical babysitter/kidnapper) was slang for tranquilizers in his/her part of the world. I wonder if that's what happened (although the duct tape found with the body makes this questionable), that the mom wanted her child sound asleep so that she could leave her and go party, and when she got back she realized that she'd administered a fatal overdose.