Disclaimer: This article contains mentions of suicide. Reader discretion is advised. A Netflix documentary titled Tread revisits Marvin Heemeyer’s Killdozer rampage in Granby, Colorado, in 2004.
GRANBY, Colo. – Friends said Marvin Heemeyer hadn’t been seen much lately, and now they know why: He was turning a bulldozer into an armor-plated vehicle that was impervious to SWAT team bullets.
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