How illegal dispensaries are a threat to the legal cannabis industry

The booming business of cannabis is what many investors are calling the new gold rush. But with those potential riches comes this reality: there's a much bigger boom in the black market of weed that's crippling legal sales. CNBC's investigates what's really going on inside the unlicensed dispensaries which play by their own rules.
Fri, Jul 12 20197:36 AM EDT