Just because its really grinding my gears...
Dachshunds do not kill badgers, or wild boar (seen that somewhere else)...
They hold them at bay, shouting their heads off, until someone comes to dispatch the badger/boar/whatever else they're yelling at.
If you've ever clapped eyes on badger, boar or dachshunds, you would see how that idea is utter nonsense. (They've also not been used for badgers for a long time and for boar even longer!)
They are more than capable of killing a very small baby of course, that is not in dispute.
I still wonder where the 'silent strangulation' thing came from, even if the dog did asphyxiate the child as a cause of death, that would not be instant or silent. It seems an odd thing for even the gutter press to invent completely though!
Dogs do not lie in wait and then sneak in and kill the baby silently, sneakily, when everyones asleep. That isn't how dogs function.
The parents of course already were negligent in both care of child (exposing to risk of this dog) and care of dog (thinking dealing with the dogs aggression by tying it up was appropriate). Whether they actually killed the child themselves, or were further negligent in being so out of it for whatever reason they didn't hear the attack happening... we can only speculate, which of course, some people will say we should not do, but if these things are never discussed, how does anyone learn anything?