There was one good nugget in there. Community based violence prevention efforts.
Not touchy-feely stuff, like midnight basketball, but real data driven analysis to find future likely offenders and victims, with police and community figures working together, talking with the at-risk people to try and defuse conflicts have proven successful.
Actually digging into inner-city urban dynamics and figuring out who has a "beef" with somebody, and diffusing it in a no-judgment, no criminal jeopardy way actually has shown to work.
Unfortunately, crimes that never happen don't generate calls for funding. And most of these efforts dry up after a few years.
It's a good way of addressing that roughly half the murder/crime in America is getting committed by 7% of the population. And the victims are largely overrepresented in the same numbers. It's verboten to actually discuss this openly, and these kinds of programs are still able to address it.
If every major city in the US had a program like this, and kept at it, it would cut a significant chunk off the top of our murder stats. It wouldn't do much to deter crimes of passion, or armed robberies gone wrong, but the inner-city honor culture and cycles of retaliation type of shootings that's a huge bulk of our murder stats could be greatly reduced.