Nope, no way a ball python is capable of killing (or even hurting) anyone. I mean, the worst they can do is leave some pinpricks on your arm from a bite, but most aren't even biters and they're not venomous. A two foot long snake can't do anything to a human of any size. Quite frankly, the snake is more likely to be hurt by the kid than the other way around.
Quite honestly, that article made me laugh. I don't even see bite marks on the baby's foot. And the "slimy" comment... pfffft, did that guy even touch the snake?