Missing from this story (understandably, as the focus is elsewhere), are a few facts that give some badly-needed perspective  

"But Chicago is not the homicide capital of the United States. New Orleans, St. Louis, Detroit, Baltimore and Newark all have higher rates when you drill down the data per capita."

CNN, online, update, Jan 1 2017.  

Also: see revealing graph that shows how murder rates per capita have actually fallen drastically since the high point (around 1995)...

So, these facts and the fact that the police have been under scrutiny really mean it's "good news."