Well, he bit the police officer, who in my opinion did not overreact. Surely, the officers are not required to stoically accept the bite of every dog that has the inclination to lunge at them. If that dog isn't removed from his chain NOW, the next victim might well be someone who is not so equipped to defend him/herself.

Why does he have the dog if all he does is tie it to a tree? The dog is well named.

Bone is the perfect name for a dog that belongs to a bonehead.