David Duane `` Dave '' Freudenthal ( born October 12 , 1950 in Thermopolis , Wyoming ) is an American politician . He acted as the 31st Governor of Wyoming . David Duane `` Dave '' Freudenthal ( Ë friË dÉ nÎ É ` Ë l ; born October 12 , 1950 ) , is an American politician who served as the 31st Governor of Wyoming .