Tread

Tread investigates the extraordinary events that unfolded in the small town of Granby, Colorado, on June 4, 2004. It explores the life and motivations of Marvin Heemeyer, a local welder and muffler shop owner, who embarked on a destructive rampage through the town using a heavily modified bulldozer.

The documentary traces Heemeyer’s journey from a seemingly ordinary businessman to a man consumed by resentment and anger. At the heart of the story is a zoning dispute that occurred in 2001, which appears to have been the catalyst for Heemeyer’s subsequent actions. The film examines how this conflict with local officials and fellow townspeople gradually eroded Heemeyer’s sense of justice and belonging in the community.

Central to the narrative is Heemeyer’s clandestine project: the modification of a Komatsu excavator into what would later be dubbed the “Killdozer.” The film details how Heemeyer, utilizing his welding skills, transformed the bulldozer into an impenetrable fortress on tracks. This process, which took place over many months in an industrial shed, resulted in a vehicle that was virtually unstoppable and became the instrument of his revenge.

The documentary features interviews with various individuals connected to the incident including local law enforcement officers, town officials, and residents who were directly affected by Heemeyer’s rampage. Their testimonies offer insights into the community’s shock and disbelief as the events unfolded, as well as the long-lasting impact on the town of Granby.

One of the most intriguing aspects of the film is its use of Heemeyer’s own words. The documentary incorporates audio recordings that Heemeyer made before his rampage, providing a chilling glimpse into his state of mind and the rationale behind his actions. These recordings serve as a haunting narration, allowing viewers to understand the depth of Heemeyer’s grievances and the extent of his planning.

The film also explores the broader implications of Heemeyer’s actions, touching on themes of social isolation, the impact of rapid development on small towns, and the potential consequences of unresolved conflicts within tight-knit communities. It raises questions about the fine line between standing up for one’s beliefs and taking drastic, destructive action.

While the documentary presents a thorough examination of the events leading up to and including the rampage, it also grapples with the aftermath. The film considers how the town of Granby and its residents have come to terms with the incident in the years since, and reflects on the complex legacy left by Heemeyer’s actions.