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Tyler Williams of Blanchester, Ohio, looks over marijuana strains at the 3-D cannabis dispensary on January 1 in Denver, Colorado.
Tyler Williams of Blanchester, Ohio, looks over marijuana strains at the 3-D cannabis dispensary on January 1 in Denver, Colorado.

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    Legal pot poses challenges for police

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Legal pot poses challenges for police

CNN's Miguel Marquez covers the roll out of legal pot in Colorado and some of the tough issues facing law enforcement.

Legal pot poses challenges for police

CNN's Miguel Marquez covers the roll out of legal pot in Colorado and some of the tough issues facing law enforcement.