Pierce died Monday at the federal prison in Allenwood, Pa., where he had been locked up since 1987 when he was sentenced to 250 years.
Pierce, a resident of Montana, was a reputed neo-Nazi who pumped 13 shots into the Jewish talk-show host from KOA radio in 1984. The incident was the basis for "Talk Radio," a play by Eric Bogosian that was adapted into the feature film of the same name, directed by Oliver Stone.
A prison spokesman told The Denver Post Pierce was "an average inmate" who passed the time working at the institution and taking part in recreational activities.
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