J. J. Cohen

Jeffrey Jay Cohen is an actor who has appeared in film and on television. Cohens first feature film was in the 1984 film Paradise Motel. It was not until 1985, he would get his big role in the film Back to the Future as Skinhead, a member of Biff Tannens gang. In 1989, he reprised his role in Back to the Future Part II, a year later, he appeared in Back to the Future Part III as a member of Needless gang.

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Source: Wikipedia