Your comment about how the other officer was in the line of fire is more concerning to me. Shows very little situational awareness. Likely the officer developed tunnel vision and was not aware of his background. The drivers door was blocked by another vehicle so the perp could not get out and directly attack the officer.
In order for the perp to get out, he would have had to crawl out the passenger side. Unless the officer SAW a gun (he might have) there was no need to shoot. Even so, the apparent lack of communication and situational awareness is concerning. This seems to be a failure of training to me.
“Your comment about how the other officer was in the line of fire is more concerning to me.”
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I believe that was a stun gun, but still could have been bad.
“Unless the officer SAW a gun”
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No one ever mentioned that. And the only weapon mentioned on the video was the knife, which a cop extracted and put on the car hood.