The part where I disagree is that the person is the source of the liability rather than training and instruction. What this tells me, clearly, is that firing drills entirely neglect nonlethal options, and fail to incorporate tool selectivity.
"The source of the liability"? As a 26 year old veteran of the force, and president of the Brooklyn Center police union, if there is a serious problem with police training, she is
also very much a part of
that problem.
It is moreover obvious that she did have some training in the use of tasers, given that she shouted "taser taser taser" before drawing her weapon. I'm not saying there isn't a training problem, as I suspect they drill them on guns a lot more than on non-lethal actions. But if the argument is that she just didn't know how to identify or use a taser, that to me seems quite suspect. She clearly knew what the taser was, though I think it is fair to ask whether even that option would have been appropriate in a situation where no danger was apparent.
Thing is, I believe her completely that this was an accident. But there are accidents that should not and must not happen, and accidental street execution of unarmed American citizens for is one of them. If you work in a public role, with official authority of any kind, the safety of those in your care becomes an immediate and real personal responsibilty for the safety and wellbeing of the citizens you work for, and anyone who does not understand that should not hold such a role at all. If I made a mistake that took the life of one of my students - let's say, running one over with one of the school vans while on a field trip - you think anyone would be saying, "hey, the real problem here is the DMV for giving him his license?" A public agency is not an LLC. Ultimately, there must be individual liability for "accidents" that take the life of an innocent person. Said life taker
knows they are responsible for the safety of those around them and agrees to shoulder that responsibility. Specially responsible, not incidentally responsible.