I had been hoping they would get charged with it because there had been previous talk of child abuse and neglect anyway. I'd read reports where people suspected one of them may have accidentally killed the little girl and put the snake on her to make it appear that the snake had done it.

Wasn't there a report that said there were no bite marks found on the girl?
If the snake had done it, there would be a mark where it struck and bit. Plus a bit of blood.

:edit:
If I remember correctly.. It was found just laying on top of her. It was not wrapped around her. It was not trying to swallow any part of her. None if it makes any sense to me.