This article was produced for ProPublica’s Local Reporting Network in partnership with The Denver Gazette. Sign up for Dispatches to get our stories in your inbox every week. The owner of a marijuana ...

State regulators are putting Colorado's marijuana industry on notice. They're warning bad actors who are bringing hemp‑derived, often chemically-altered products into the state's legal marijuana ...

A hemp field in the San Luis Valley. Photo courtesy of Colorado Department of Agriculture. Colorado regulators announced last week that they plan to crack down on companies that illegally substitute ...

A Feb. 10, 2012 photo shows Matthew Huron, owner of two medical marijuana dispensaries and an edible marijuana company in Denver, examining a marijuana plant in his grow house. Medical marijuana is ...

Leaders in the Colorado marijuana industry have complained in recent years that intoxicating products derived from hemp are endangering consumers and creating unfair competition, threatening to upend ...

Getting your Trinity Audio player ready... Colorado’s health department and the Marijuana Enforcement Division will collect samples from dispensaries around the state in a one-time spot-check for ...

Getting your Trinity Audio player ready... When Colorado and other states began legalizing marijuana more than a decade ago, they faced a problem: how to guarantee a safe product, with little data ...