I see stuff wrong with this on many levels.
First off - why would someone name a dog killer and not expect some aggressive behaviour?
Who in their right mind lets a small child near an eating dog?
She resents the fact that the dog was not neutered?!? This dog didn't even have shots!
How many people want to place bets on whether the dog had any type of training? I wonder how many times the neighbors had seen Killer running loose on the street?