There are a lot of Monday morning quarterbacks critiquing the instructor's methods displayed in the video accompanying the article. Frankly, it looked to me like he did things right but I am not particularly qualified to offer anything but a layman's opinion. What I do know is that I feel sorry for the little girl and the instructor's family. Mistakes or not, it is still a tragedy.
The incident itself is a controlist's wet dream: A dead firearms instructor, a messed up little girl and press coverage of the whole thing. I suspect Sarah Brady and Shannon Watts will comment on the matter right after they finish masturbating.