I've done a reasonable amount of digging on this case, and I've decided it's a clean shooting, 100% by the standards of basic U.S. police protocol. There's no doubt that the practically daily police shootings are a huge problem so it is easy to have biased views from the start and I succumbed to that like everyone else on this one.
I still think even justified police shootings could largely be prevented if our police system was overhauled.