And many are going to say well he should have gone to a less lethal option, eg a taser - but what happens if he tases her and she still initiates and kills the other girl? I say the columbus one is a justified shoot, even if it is tragic that someone young has lost their life.
I think if the exchange was longer and more conversational, then the "should've tased her" argument would hold water. But he just arrived, got spun around, and when he turned back, he saw the knife and other girl trying to back away from the knife. He waited until the last moment before firing.
Where the cop might have been too excessive is either bullet number 3 or 4. I think number 4 is unambiguously excessive; that's when the teenager clearly fell down and no longer a threat to the other girl/woman. It will be a matter of the autopsy to determine which was the bullet most responsible for death; if it was bullet number 4 that was the killing blow, he must be punished to some extent. If it were self-defense, self-defense itself requires
imminent danger, meaning, it's damn about to happen in a split-second. In slow-mo, imminent danger was present with the first two, but when the third was shot, she spun and fell. He was able to process and react to the last point before the girl was going to make the downward stab, so he could have ceased immediately when the teenage girl and spun and fell after bullet 2 and the other one got away.
So, I would
not fully vindicate the cop. But the teenage girl certainly provoked his response first.
The real matter is how did the situation escalate to the point a hothead teenage got her hands on a knife and wanted to stab someone so badly with adults present.
I even heard one of them stated that the cop "is not supposed to be here". So, was this some dispute the parties were planning on settling "internally" but a neighbor called?
The people might be family or "friends", meaning they knew each other.
Also, daddy of the dead could be nominated for a Oscar with his constant yelling into the camera of "you shot a little girl".
If there is one thing that irks me, it's teenagers can be called boys or girls. The dictionary definition may technically be correct, but there is a huge connotative difference between a prepubescent child and one who has gone through or is going through puberty. Teenagers are high-maintenance proto-adults with ever increasing adult tendencies, often with impulsive belligerence or recklessness to along with it.