Every driver in Chicago is vulnerable to the same thing—being pulled over and judged within seconds by an officer who believes they are impaired. The problem is, not every sign of impairment is due to alcohol or drugs. For many drivers in Illinois, medical conditions such as diabetes, epilepsy, or neurological disorders can lead to symptoms that mimic intoxication. These misread signs can result in criminal charges for DUI when the person wasn’t under the influence at all.
Illinois law under 625 ILCS 5/11-501 defines driving under the influence as operating a motor vehicle while impaired by alcohol, drugs, or any intoxicating compound. A DUI can also be based on a chemical test showing a BAC of .08 or higher. But nowhere in that law does it state that a person can be legally charged because they had a medical event. Yet that’s exactly what happens when officers misinterpret a diabetic crash or seizure as a sign of drunkenness.
Officers often rely on visual cues and behavior when deciding whether to arrest someone for DUI. This includes bloodshot eyes, slurred speech, disorientation, and failure to follow instructions. However, a person in the middle of a hypoglycemic episode can display those symptoms too. If the officer sees what they expect to see, confirmation bias kicks in—and the next thing that happens is a roadside sobriety test and an arrest.