[G Larry]

“And, Officer, since I couldn’t be sure who he might shoot next, I had to protect my family, ......”

[Jonty30]

That is pretty much an excusable shooting. The officer, if he shoots a dog when it is not posing as a threat, is showing himself to be a threat.

If I understand US criminal law, it is permissible to shoot a cop under those conditions as you would with anybody.

[Pontiac]

“And, Officer, since I couldn’t be sure who he might shoot next, I had to protect my family, ......”

Because the other cops would immediately unload their weapons in to your body you would never get to express your fear.