https://www.chicagomag.com/chicago-magazine/chicago-crime-statistics/chicago-crime-rates/ https://www.chicagomag.com/chicago-magazine/chicago-crime-st... The b

https://www.chicagomag.com/chicago-magazine/chicago-crime-statistics/chicago-crime-rates/ https://www.chicagomag.com/chicago-magazine/chicago-crime-st... The best documentation of this I know of is from Chicago about 10 years ago. The above was the first article by the journalist I associate with it.