This spring, 16 state patrol officers from Colorado and Wyoming took a couple days off their usual work schedule to do something special. They assembled in a hotel conference room in Denver. As instructed, they wore street clothes for their first assignment: going shopping at nearby marijuana dispensaries.
NPR. “Scientists Still Seek A Reliable DUI Test For Marijuana.” 420intel.com. 31 July 2017. Web. 8 August 2017.