File photo of Dahl wearing novelty sunglasses adorned with artificial marijuana leaves at a pro-marijuana rally at the University of Colorado in Boulder

 
File photo of Dahl wearing novelty sunglasses adorned with artificial marijuana leaves at a pro-marijuana rally at the University of Colorado in Boulder
Brandon Dahl wears novelty sunglasses adorned with artificial marijuana leaves as he sells them across the street from a pro-marijuana rally at the University of Colorado in Boulder, Colorado in this April 20, 2012 file photo. REUTERS/Rick Wilking/Files