Is Colorado’s marijuana black market growing? Experts say it is difficult to truly measure something that is happening underground, but most of the existing measures from law enforcement point to a black market that has grown since recreational use and purchase of cannabis was legalized in 2014.

Five years ago, Colorado voters decided to stop sending adults to jail simply for using marijuana. Proponents said the legalization of cannabis would have a healthy side effect: it would kill the sale of illegal marijuana in Colorado. But instead law enforcement officers say Colorado has become a major exporter of illegal marijuana.

From the front window of Jeanne Hanks’ Firestone home, she and her daughter watched nervously as a truckload of armed law enforcement officers piled into the house next door in March 2018.

Law enforcement in Colorado are not the only ones seeking an end to the state’s underground marijuana black market. The cannabis industry wants it gone too.

A killer speaks out from behind bars for the first time and says a marijuana edible caused him to murder his wife. "I didn't know it was my wife!" he exclaimed. RMPBS looks at new emergency department research related to edibles.

Behind the scenes as a reporter details why she pursued an interview with the killer who claimed a marijuana edible caused him to kill his wife.

Post-Traumatic Stress Disorder is a signature wound from the wars in Iraq and Afghanistan. Colorado is funding a study to determine if marijuana can be an effective treatment for veterans who suffer from PTSD, but researchers say VA rules about marijuana are hampering recruiting

Cannabis use among pregnant and breastfeeding mothers is on the rise. Health officials warn of possible risks to babies.

It's always 4/20 somewhere — at least in Colorado. The state's marijuana shops have reached a massive new milestone: $1 billion in legal, regulated sales in the first 10 months of 2016.

Now legal in eight states, there are unanswered questions about the impact of recreational marijuana on public health. To maximize potency, pot can be purified for maximum THC, its psychoactive ingredient. But a lack of research and restrictions on these very high concentrations is raising concerns.

Dabbing gives the rush of an instant high. And in Colorado, where recreational marijuana is legal, there are no limits on THC concentration.

Increased availability of marijuana in Colorado could lead to more children accidentally ingesting the drug, according to a new study conducted in the state. Voters last fall in Colorado and in Washington state legalized sales of pot for recreational use to anyone 21 and older.

He’s 16 but his baby face makes him look a little older than 10, his age when he first tried marijuana.