In general anything less than killing or maiming someone should be the utmost priority.
But as I said: also a taser can kill and also tackling someone and pinning them to the ground can. So I would put less focus on the methods and more on the intention. Cops should neither have to act out of fear (that’s what training is for) nor out of pleasure. And some cops just seem to get off on being in control. If cops generally would want the best not just for themselves and other civilians but also for the perpetrators, a lot of the problems would solve themself.
Being whistleblower and being involved in such legal proceedings sucks and I can imagine that one might give up (like Barnett in March) or that it takes a huge toll on your body (like Dean now). But then again … two such incidents around the same company … reminds me a bit too much of russian windows.