Nice screed, which complete sidesteps the thrust of the study it references. From the linked study:

Go to HeyJackass.com

Not only the numbers, neighborhoods and race of shooter and shootee, but where physically they got shot, including those that wound up shooting themselves (selfies) and in the junk or ass.

http://heyjackass.com/

In a city of 2.7 million people, about 1,400 are responsible for much of the violence, Mr. Johnson said, and all of them are on what the department calls its Strategic Subject List.

So far this year, more than 70 percent of the people who have been shot in Chicago were on the list, according to the police, as were more than 80 percent of those arrested in connection with shootings.

Chicago Police Dept. Plagued by Systemic Racism, Task Force Finds APRIL 13, 2016In a broad drug and gang raid carried out last week amid a disturbing uptick this year in shootings and murders, the Police Department said 117 of the 140 people arrested were on the list.

“We are targeting the correct individuals,” Mr. Johnson said. “We just need our judicial partners and our state legislators to hold these people accountable.”

And there is your solution.