I wonder if Chicago has gone say, 24 or 48 hours without out a shooting in the last year.
Or 25 to 6 to 4 hours?
(Sorry, couldn't resist)
Maybe inner-city Chicagoans learn to set their times by the particular kind of shooting...
Two old dudes sitting on a stoop. They hear the screech of car tires, followed by five gunshots. "Dinnertime!" one says to the other, and heads inside.