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When Can a Victim’s Intoxication Matter in a Michigan DUI Causing Death Case?
Short Answer
Victim intoxication can be relevant in a Michigan DUI causing death case, but not simply because alcohol, marijuana, or another drug was found in the victim’s system. The important question is whether the victim’s intoxication, considered together with the victim’s conduct and the other circumstances of the collision, tends to show gross negligence that could affect proximate causation. The Michigan Supreme Court’s 2026 decision in People v Morgan makes clear that courts should not evaluate intoxication, speed, acceleration, reaction time, and other relevant conduct in separate silos.
Victim intoxication can become an important issue in a Michigan DUI causing death prosecution when alcohol or drug evidence bears on the victim’s conduct and the causation analysis. But the legal significance of that evidence is more complicated than simply asking whether the victim was intoxicated or even by learning how intoxicated they were.
Michigan Criminal Defense Lawyer Blog


Michigan’s implied consent law rests on a legal fiction: by accepting a Michigan driver’s license, a person is deemed to have consented in advance to a chemical test if lawfully arrested for OWI. But that fictional consent cannot operate as a legitimate exception to the Fourth Amendment’s warrant requirement until it comes into actual existence. It does so only when the officer reads the prescribed chemical test rights advisement following a lawful arrest, and the driver is given a genuine opportunity to either reaffirm that consent by submitting to the test or withdraw it by refusing. Until that advisement is given, there is no actual consent, only the legal fiction of it, and a fiction alone cannot satisfy the Fourth Amendment.