I found this article to offer some useful information and perspectives.
Black males between the ages of 14 and 17 commit homicide at ten times the rate of white and Hispanic male teens combined. Blacks of all ages commit homicide at eight times the rate of whites and Hispanics combined, and at eleven times the rate of whites alone . . .
And a larger proportion of white and Hispanic homicide deaths are a result of police killings than black homicide deaths . . .
What is behind this historic crime drop? A policing revolution that began in New York and spread nationally, and that is now being threatened. Starting in 1994, the top brass of the NYPD embraced the then-radical idea that the police can actually prevent crime, not just respond to it. They started gathering and analyzing crime data on a daily and then hourly basis. They looked for patterns, and strategized on tactics to try to quell crime outbreaks as they were emerging. Equally important, they held commanders accountable for crime in their jurisdictions. Department leaders started meeting weekly with precinct commanders to grill them on crime patterns on their watch. These weekly accountability sessions came to be known as Compstat. They were ruthless, high tension affairs. If a commander was not fully informed about every local crime outbreak and ready with a strategy to combat it, his career was in jeopardy . . .
As a result of the anti-cop campaign of the last two years and the resulting push-back in the streets, officers in urban areas are cutting back on precisely the kind of policing that led to the crime decline of the 1990s and 2000s . . .