Something _like_: make police leadership legally accountable for the actions of their officers. I say something _like_ this because it's in the right direction, but probably not the exact solution necessary. Another similar approach is something _like_ forbidding police unions or otherwise completely neuter them [with respect to Officer's actions].
Ideas like community service are good, but I think it's important to have clarity of approach (drop racism as the driving force and focus on accountability) and efficacy (make real changes).
This issue is very murky even to Americans, but everyone will say they know what the problem is or they will deny that there is a problem. If their description of the problem aligns with predictable political leanings, they're likely taking an emotionally driven perspective.