U.S. Supreme Court weighs whether to hear Michigan THC impairment case

The justices are scheduled to consider a petition challenging Michigan’s lack of a numerical THC impairment threshold after a driver with 4.6 ng/mL active THC was prosecuted despite field-test testimony showing no impairment. The Court has not agreed to hear the case, but the petition could influence roadside testing and due-process standards relevant to Oklahoma employers, drivers and cannabis businesses.