The reality is you don’t know what training the officers received.
That’s highly relevant because lots of folks want to scream “the officers shouldn’t have done X!” but they invariably are opining as they would themselves act, without knowing what the officers have been trained to do,
AND with benefit of hindsight and not in the heat of the moment.
Many police departments disallow the “knee to neck” move Derek Chauvin used - but Minneapolis PD allowed its use and sanctioned it. That will IMHO be a problem for the prosecution in Chauvins eventual trial. Why? Chauvin likely acted as he was taught to act.
So unless someone can, say, cite to a training manual for exactly what Buffalo PD did wrong, this thread is largely just so much wind from random people lacking any detailed knowledge of how these police were supposed to act.