The vast majority of people in jail before trial are not suspected of shooting anyone. Many are low-level offenders waiting in jail for months despite still having the presumption of innocence. Often the time they spend in jail before trial exceeds the length of the sentence they would get if convicted. This can pressure people to falsely plead guilty since it's actually the fastest way to get out of jail.
The policies implemented in Chicago weren't exactly targeting jaywalkers - some 10 people get shot in Chicago every weekend for about a decade now with a huge asymmetry of how the justice system deals with people that shot and missed.
