A Chicago Police Department spokesperson blamed data collection errors and lax supervision for the unreported stops.

1:47 a.m., male, 22, of Rosenberg, pedestrian crossing between intersections; possession of marijuana, less than two ounces.

• A man reported he left his wallet at a bar he regularly goes to and that no one had turned it in. He noted two "non-regular ...

A recent discussion between former Chicago law enforcement officials shed light on the origins of real-time crime centers, the role of data-driven policing, and the impact of policy changes on crime ...