“In that video, the person responsible for the death of the dog is the dead black thug.”
Yes, in a Karmic sense, but it was cops that were pulling the triggers.
Who created the situation and forced the hand of the police?
In the end, the duty of canine officers is to ensure that human officers go home after dangers situations. Sometimes that duty claims their lives, and that is the highest price that our canine friends pay instead of the officers paying.
But it is always the criminals that bear full responsibility for the outcome of the situations that they cause.
Not in a Karmic sense, but in every sense.