In 2005, the city of Denver passed a ballot measure removing the criminal penalties for possessing less than an ounce of marijuana. But because possessing the drug is still illegal under Colorado state law, actual arrests for possession actually went up the next year.
Last year, the city of Denver passed another initiative calling on Denver police to make marijuana enforcement their "lowest priority."
Possession arrests went up again. In fact, they’ve jumped about 50 percent since 2004, the year before the first initiative passed.