Big brother, big sister= Government endorsed program overwhelmingly involving (and funded by) outside communities.
Community center= Nothing unique to black communities, and funded through various sources, including taxpayer.
Mentorship programs= Often taxpayer funded and generally consist of outside communities reaching in.
"Several stories" about people giving back to their communities= Yeah, they are stories because this is rare.
Nothing you mentioned demonstrates any signs of accountability from WITHIN. You've provided no policy proposals or actions that could be taken to help. Only complaining and pointing out injustices. We know there's a damn problem, but please point out exactly what is is, and provide a viable solution. Otherwise, what is the point of this whole discussion? The bolded is incredibly naive, and will never happen as long as there's crime. It's a catch 22. On one hand, governments (local, state, and federal), are dealing with a majority of constituents who are (rightly) concerned about violence in their communities. On the other hand, you have these annoying voices in the background essentially telling lawmakers that they need to be working on policy to make law enforcement less able to execute their jobs effectively because it hurts some feelings. This will NOT happen on any considerable scale. You might get some body cameras and a few weapons taken away, but until the overall levels of violence decline in these places, people will continue to get frisked for no good reason, and some people will even get shot every once in a while by stupid cops for doing stupid things.