Pot is legal in Colorado but driving under its influence isn't. Still, there's really no fast, reliable and readily available test for marijuana DUI. We'll hear about researchers trying to crack that nut, and take you into a top DUI training program for law enforcement. Then, if the Trump administration eliminates a program to protects people brought illegally into the country as children, Metropolitan State University of Denver could be hit hard. The school has hundreds of DACA students. And who knew? Bacteria have a sense of touch. If scientists can block it, they may make a lot of headway in fighting disease. Plus, author Erik Storey has a second book out featuring his signature character, Clyde Barr. We spoke to him last year about the first book in the series.