What is important are the next steps: the police needs accountability, police misbehaviour must be investigated independently. Not by the police, not by the prosecutor they work with every other week. The police must be made to understand they are being watched, very closely, by technical, legal and human means. Only then will they think twice before stepping out of line. And each misstep needs to have proportionate consequences that take into account the misuse of power as well as the crime itself, so punishment must be harsher than for mere mortals, not the usual slap on the wrist.
Changes in training or authorized uses of force are useless smoke and mirrors without proper accountability.
Quis enim custodiet ipsos custodies?