evidence: Now, all these years later, I fear we are facing another wave of violent crime and homicide, and our communities are once again in trouble. And the trouble is complicated, layered, and painful. [...] In Washington, D.C., we’ve seen an increase in homicides of more than 20 percent in neighborhoods across the city. Baltimore, a city of 600,000 souls, is averaging more than one homicide a day—a rate higher than that of New York City, which has 13 times the people. Milwaukee’s murder rate has nearly doubled over the past year. Police chiefs say the increase is almost entirely among young men of color, at crime scenes in bad neighborhoods where multiple guns are being recovered.