I don't understand how every single person who has replied in this thread could condemn this man for killing his dog. He said it was an accident and I doubt he would do it again. I find it hard to believe that none of you has ever killed or caused the suffering in anything. Surely not all of you are vegans?
To be honest I wouldn't mind if he had hit the dog with a shovel to kill it. He didn't asphyxiate the dog, I personally don't even see how he caused the death at all. It sounds like you guys are simply persecuting him for his name.
And it disturbs me that that somebody would relate killing a dog to killing a child. And you say he is a psychopath?