Use and possession of cannabis is illegal under U.S. federal law. But policies regarding medicinal and recreational use vary greatly at the state level.

Colorado famously legalized marijuana in 2014, authorizing licensed growers to cultivate and sell pot locally.

 The state’s $1.5 billion industry, however, has been threatened by criminal activity, like moving product over state lines or forging paperwork. And it’s becoming a problem for law enforcement.

But a solution may arrive this summer.