Well, if the sidewalk is my property, I should have been maintaining it to ensure against such occurrences. However, I am not liable for my neighbor's injury anyway, seeing as he or she was trespassing on my property.
This dog case is completely different. The owner of the dog must've known that the chain was too long, allowing the animal access to the neighbor's lawn.
Thus, the death of the child did not take place because of any trespassing on the part of said child, but, instead, because of the irresponsibility of the dog's owner, Latasha Laster.
This certainly wasn't intentional, but crimes do not have to be intentional; manslaughter never is.