I do see the Mayor and Governor doing nothing about the 20 to 40 shootings that every weekend in Chicago and have been going back years.

They've tried all the standard theories, they haven't worked, but not because they didn't try. There was a reduction in the murder solution rate from around 90% to ~60%, and that was blamed on people not cooperating with police. I wonder why? But I think reality may include the possibility that occurred in the Philippines. In areas the Philippines was getting murder clearance rates ~85%, a high clearance rate. Then they went form the manual police blotter to an electronic police blotter that got closed out every night and the data transmitted out. Keeping a second police blotter to support the stats you like no longer worked. The murder solution rate dropped to 60% and overall the solution rate was around 21%. Yes, only one in five murders were solved. And I've read about some of the solved homicides and the detective work can be very good. Still the solution rate is very low.

Chicago's solution rate is ~60% now, and they are focusing on that, but you do need the population to cooperate as most of murders are solved by detective work, along with forensic science. To do that it would help if all the beat officers were trained in how to interview people at the scene of a murder and who to interview - they're mostly crime scene control until the detectives get there.

Every time something new is tried there's an initial positive response and then it goes back to being the same. The question still goes back as to why people stopped cooperating with police. Trust methinks. And isn't Trump doing a bang up job of getting the police trusted again?