I wouldn't really put it in the same league as other senseless police killings, the girl was attacking someone with a knife. It's tragic, but if you're going to be deploying deadly force, that's probably the type of situation you do it in
In an ideal world, there would have been a better outcome for all involved: no balanced individual would wish death on the girl regardless of the circumstances.
However, the footage clearly shows that the girl is armed with a knife and appears to be lunging with the weapon; the officer is stood a number of yards away.
The duty of the officer is to protect life and from the video footage it appears that serious harm or death was a reasonable outcome if the attack continued.
In that split second, could another means be reasonably employed that would stop the attack in sufficient time and/or not put the officers life at serious risk?
Again, in that situation could the officer, on the balance of probability, be assured that one round would be enough to neutralise the threat? Doubtful for both.
When you consider all that, I personally think it's a justified reaction to the situation. It's regretful someone has died, but objectively I can't see another scenario.
