History and Historiography Honoring the Memory of the Great Marvin Heemeyer By Keith Preston on June 4, 2023 • ( Leave a comment ) After his zoning petition was repeatedly dismissed, Marvin Heemeyer decided to modify a bulldozer into a lethal “killdozer” and go on a rampage in Granby, Colorado. READ MORE Attack the SystemTweetMorePrintShare on TumblrReddit Categories: History and Historiography