On June 4, 2004, Marvin Heemeyer, a 52-year-old welder and muffler shop owner in Granby, Colorado, unleashed a rampage that would etch his name into infamy as the “Killdozer” driver. Frustrated by years of disputes with local officials and business owners—particularly over zoning issues and a concrete plant built near his shop—Heemeyer transformed a Komatsu D355A bulldozer into an armored juggernaut. He spent over a year reinforcing it with steel plates, concrete, and bulletproof materials, equi