Helena Man Arraigned in Pipe Bomb School Threat

Logan Sea Pallister, 24, of Helena, stood before a federal magistrate Friday in Great Falls, not a word of remorse passing his lips as he pleaded not guilty to a trio of explosive charges tied to a plot to level a Helena Public Schools building with pipe bombs. The indictment, unsealed today, paints a chilling picture of a man who didn’t just fantasize about destruction—he took concrete steps to carry it out.

Charged with attempted property damage by use of fire or explosive, possession of unregistered destructive devices, and possession of an unregistered silencer, Pallister now stares down a mandatory minimum of five years in federal prison. If convicted on the most serious count, he could serve up to 20 years, face a $250,000 fine, and spend three additional years under federal supervision. No plea deal was announced.

According to the indictment, on May 31, 2022, Pallister moved beyond idle threats. He allegedly assembled and possessed multiple pipe bombs—improvised explosives capable of leveling walls and shredding flesh—and took a substantial step toward using them against a public school facility. The building targeted, though not named in court filings, remains a nerve center for hundreds of Montana children. The motive remains under investigation.

The case also reveals Pallister was in possession of a silencer not registered in the National Firearms Registration and Transfer Record—a violation that carries its own federal teeth. Both the pipe bombs and the silencer fall under Title II of the National Firearms Act, laws designed to keep battlefield-grade weapons out of civilian hands. Pallister, authorities say, had no business possessing any of it.

U.S. Magistrate Judge John T. Johnston ordered Pallister held without bond, citing the danger he poses to the community. The arraignment, held in the U.S. District Court for the District of Montana, Great Falls Division, was brief but tense. Assistant U.S. Attorney Jeffrey K. Starnes, who is prosecuting the case, laid out the government’s stance with cold precision: this was not a prank, not a cry for help, but a criminal act with catastrophic potential.

The investigation was conducted jointly by the Bureau of Alcohol, Tobacco, Firearms and Explosives and the Helena Police Department. Case 23-02 is now active in the PACER system, where documents can be accessed by the public. As the calendar ticks toward trial, one question looms: how close did a Montana school come to disaster? The answer may soon unfold in court.