So the double tap is out now and the emptying of the clip is now vogue.
“double tap is now out”
If you don’t know you hit, I can imagine firing more.
Again, I don’t think there’s enough info in the story to surely side with either party.
However, once firing begins, you can conclude that it doesn’t cease until the perceived conflict is over.
Whether the cop was justified or not, I really have no idea.