"One of the [arguments] for legalizing marijuana [in Colorado and Washington state] ... was to reduce the black market," said Tom Gorman, who heads a multi-state task force called the Rocky Mountain High Intensity Drug Trafficking Area. "In fact, the legalized marijuana has become the black market for other states."
Links
[1] http://www.foxnews.com/politics/2014/06/06/colorado-new-black-market-pot-legalization-causing-headaches-for-surrounding/
[2] http://rethinkpot.org/tags/colorado-0
[3] http://rethinkpot.org/tags/black-market