Illinois DUI evidence at trial typically includes the officer's observations of driving, the reason for the stop, physical signs of impairment such as odor, red eyes, and slurred speech, statements made by the defendant, field sobriety performance, portable breath test results limited to probable cause, evidentiary breath, blood, or urine test results under 625 ILCS 5/11-501.2, dashcam and body cam video, photographs, and any accident reconstruction. Prior DUI convictions are inadmissible on guilt but relevant on sentencing and license status. Refusal is admissible as consciousness of guilt. A Chicago DUI lawyer files motions in limine to trim inadmissible material before the jury sees it.
