CBS Denver:  “The State of Colorado will start phasing in mandatory lab testing of marijuana edible products on May 1. Currently, marijuana product testing of any kind has been performed strictly on a voluntary basis.  As Colorado ramps up its lab testing, CBS4 requested permission to perform independent lab tests of edible products but was forbidden by the Marijuana Enforcement Division. . . . Steep Hill Halent Labs tested 13 marijuana edible products for potency. Lab director Joseph Evans said only three of the 13 products tested close to the potency promised on the packaging.”