Extremely good breakdown
here of why "better training" or "more accountability" of police isn't enough.
Politicians, these big city mayors, have embraced and accepted that they’re going to solve their political problems through police, in ways that allow them to avoid any challenges to those local economic elites that are driving these neoliberal transformations. When there is a challenge to the abusiveness of policing, the response can’t interfere with those economic arrangements that are at the center of their power. So instead they generate a whole series of symbolic interventions that are designed to be incapable of addressing the problem substantively.
Seriously read the whole thing.