I saw the video of them measuring that snake. It measured out at 8 foot 5 inches. Let's be generous and say 9 feet. Not that big for a burm. It was also on the thin side. I'd guess between 12 and 18 lbs. I've got an 8 foot boa that weighs 15 lbs, as of Monday, and is almost the same thickness as that burm. Let's be generous again and say 20 lbs.
Now, a 9 foot 20lb burm is NOT going to try to eat an average 2 year old human. Even if it was starving, that is simply too large a prey item to swallow unless that child was abnormally small.
I smell a big stinking heap of crap in their story.
But, I could be wrong. For the sake of the child, I hope I am. I would much rather think that an innocent slither just out being itself killed this child looking for a meal than the only other possibility; that the child was already dead, how I don't even want to know, and the snake is being blamed.