A man authorities say vandalized and started a fire in a South Side Beltline office building in 2016 pleaded guilty to felony arson Tuesday. Dustin Palmer, 30, whose last listed address was in Reedsburg, pleaded guilty in Dane County Circuit Court to the arson of a South Side Madison office building on the evening of Oct. 7, 2016. He had tried to plead no contest to the charges but wasn’t allowed to, according to online court records.