Big or not snakes are very much wild animals, not even close to domesticated. Snake would have killed Child A and attempted to eat the child. If the snake is as big as everyone’s making out, it would’ve managed to eat a small child with difficulty, and this would’ve rendered the snake pretty useless for another feed/attack.
Snakes aren’t known for random attacks either. They attack with purpose, to feed, as otherwise uses energy etc.
When chap at work mentioned it I immediately said it was the parents. I have 3 snakes capable of killing both my children, but they’re locked in their tanks like most responsible owners do. Definitely something odd with this case…