It's sad how the Police vs Indigenous people has become such a systemic rivalry. I'm sure there have been some racist, genuinely abusive police officers, but the vast majority would be good cops doing the best they can. On the other hand, indigenous communities grow up resenting the police, to the point that even if they have done the wrong thing, they genuinely believe the only reason they get arrested or punished is because they are black.
If Mitchell was indeed the role model people are pushing him as, surely one of the main course of actions would be to try to mend this rift. Come out and apologise, accept that they were not behaving well, the police were just doing their job, and they acted poorly in response.
Instead these two are just pushing the "racist cops" angle, refusing to take responsibility for their actions, and further damaging the rift between the two parties.