Auto shop owner Marvin John Hemeyer moved to a small town in Granby, Colorado 10 years before the events described below. In 1992, he bought 2 acres (8, 100 m²) of land from a local company, Resolution Trust Corporation, for about $ 42, 000, and opened a small auto repair and auto parts shop. Business went uphill until, in 2001, a neighboring cement plant decided to expand the area, deciding to buy out Marvin's site. The proposed price was $ 250, 000, but Hemeyer agreed to sell his land for only $ 1 million.
In response, the management of the cement plant decided to simply survive the auto repair shop and, having coordinated the documents with the City Hall, decided to build additional workshops close to the territory of Hemeyer, blocking the access road to the auto repair shop. In addition, the city authorities fined Himeyer $ 2, 500 for various violations, including "tanks with sewage on the territory, not connected to the sewerage system." Chimeier was not allowed to cross 2.4 meters of factory land for such a connection. As a result, in 2004, Hemeyer sold his business and property on lease to a garbage collection company.
However, this did not end, but only began ... Tired of pressure from the corporation and the city leadership, disillusioned with the corrupt government, a former US Air Force soldier and veteran of the Vyatnam war, Himeyer himself decided to restore justice. Back in 2002, realizing that he would most likely be forced to sell the land, Marvin began to prepare for revenge, deciding to modify his existing Komatsu D355A bulldozer, or rather, installing cameras and homemade armor from several layers of steel sheets and cement on it. In some places, the armor was more than 30 centimeters thick, and the cameras and glass were protected by bullet-proof plastic about 7 cm thick.
On June 4, 2004, Hemeyer took his armored bulldozer through the wall of his store, then through the cement plant, the Town Hall, the office of the local newspaper, the house of the former judge's widow, and others. The owners of all the damaged buildings were involved in one way or another with disputes over the land owned by Chimeyer. Since the armored bulldozer was worked wonderfully well, the police could not do anything - three explosions and more than 200 bullets fired at the bulldozer practically did not harm it.
On his armored bulldozer, Hemeyer destroyed 13 buildings, the total damage was estimated at more than $ 7 million. Despite the destruction of property, not a single person, except for Himeyer, was physically injured. After the engine jammed in the "Killdozer" due to a punctured radiator, Hemeyer fired a single aimed shot at a man - at himself.
Subsequently, the modified bulldozer was nicknamed "Killdozer" (bulldozer-killer), although the only one killed in the incident was Himmeyer himself. On April 19, 2005, it was announced that the "killer bulldozer" was dismantled for scrap. It was planned that the bulldozer would be disassembled into many small parts, each of which would be sent to a separate landfill. These plans were to prevent Chimeyer fans from picking up these pieces as souvenirs.