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Proximate Cause in a Michigan DUI Causing Death Case
Short Answer
In a Michigan DUI causing death case, the prosecution must prove more than intoxication and a fatal collision. Michigan law formally calls the offense OWI causing death, but DUI is the term most people use to describe impaired-driving charges. The prosecution must prove that the defendant’s operation of the vehicle was both a factual and a proximate cause of the death. When another driver’s conduct, excessive speed, intoxication, road conditions, mechanical failure, or another intervening event materially contributed to the collision, proximate cause can become a central issue.
Proximate cause in a Michigan DUI causing death case is a separate legal issue from whether the accused was intoxicated. A blood or breath result may bear on the DUI allegation, but it does not by itself establish how a fatal collision occurred or whether the defendant’s operation legally caused the death.
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.