If that's true then it might have.
I had a dog once that regularly bit at the heels of a friend who came to the house. He never did this to anyone else. It just so happened that this friend was a meter reader who threw rocks at dogs.
Dogs have a sixth sense for things like that. And in this case the dog obviously had this officer pegged as potential trouble. The dog turned out to be right by paying for it with his life.
All it says on the Facebook page is that the police were there earlier for an unrelated incident with her father-in-law.. says at the time dog shot she was pulling the dog back by the hind legs..