We are going to execute the dog for the owners mistakes. Why not send the dog to a rescue where it can be properly trained and adopted? As for the owner, an apology and a fine should be a given.
I own a mastiff. I know what the dog is capable of doing. I also know that he is a dog. It is my responsibility to properly post warning signs, to fence my back yard and to invisible fence my front yard. (I am not allowed an actual fence in the front.) He is a dog. I am his master. I am responsible for his actions.
This conversation is going nowhere. Have a nice day.