A number of Madison Police Officers and a Dane County Deputy volunteered their time last Friday morning at the Dunkin Donuts on Gammon Road to raise money for the Special Olympics.,, Law enforcement personnel volunteer with Special Olympics throughout the year, and the "Cop on a Roof" event was another great example of this partnership., Anyone making a donation received a free cup of coffee from Dunkin Donuts., The event was a big success, and customers were very generous.,