Biography: John Keith Vernon (born Adolphus Raymondus Vernon Agopsowicz; February 24, 1932 – February 1, 2005) was a Canadian actor. He made a career in Hollywood after achieving initial television stardom in Canada. He was best known for playing Dean Wormer in Animal House, the Mayor in Dirty Harry and Fletcher in The Outlaw Josey Wales. Description above from the Wikipedia article John Vernon, licensed under CC-BY-SA, full list of contributors on Wikipedia​