Cook County DUI discovery follows Illinois Supreme Court Rule 412 and Rule 415. The state must produce the arrest report, all statements attributed to the defendant, witness lists, expert reports, physical evidence, exculpatory material, and any electronic media including dashcam and body cam. Defense subpoenas cover breath machine calibration logs, operator permits, hospital blood records, 911 recordings, and squad-car GPS. Discovery is ongoing; new material must be disclosed as it becomes available. Rule 415 sanctions include exclusion of undisclosed evidence. First appearance in the 5th Municipal District, DuPage, or Cook County branch courts typically triggers a written demand. A Chicago DUI lawyer files early and follows with subpoenas.
