This could probably have been solved in a different manner, by some warning shots from the police officer instead of outright killing her.
By the time it would take to shoot a warning shot the girl in the pink would already be stabbed.
That’s absurd.
People don’t always die because of a stab wound, certainly not from a 16-year old girl half-heartedly trying to stab another girl.
In the best case, both of them would be alive now, just with the difference that the other girl might have needed a few stitches ...
Better to shoot the person who is trying to kill someone than to risk the death of an innocent person