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BREAKING NEWS: Broncos confirm Pat Bowlen has resigned control of team due to battle with Alzheimer's More

Tetrahydrocannabinol

Dr. Christian Hopfer talks with CBS4's Alan Gionet (credit: CBS)

CU Expert Says Marijuana Increases Risk Of Severe Mental Illness

With marijuana now legal in Colorado, CBS4′s Alan Gionet talked to an expert to find out what pot does to a person’s body.

02/13/2013