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Judge allows gun and notebook as evidence at Luigi Mangione’s trial in UnitedHealthcare CEO’s killing

The ruling gives prosecutors a possible murder weapon and writings they say show motive, while some other backpack items remain suppressed.

  • On Monday, New York State Judge Gregory Carro ruled that prosecutors may introduce a 3D-printed gun and a red notebook seized from Luigi Mangione's backpack as evidence in his state murder trial, rejecting defense claims of illegal search.
  • Defense attorneys argued that Altoona Police Department officers searched the backpack before obtaining a warrant when Mangione was arrested at a Pennsylvania McDonald's on December 9, 2024, five days after UnitedHealthcare CEO Brian Thompson was killed.
  • While allowing the gun and notebook, Judge Carro suppressed other items recovered during the initial arrest, including a loaded magazine, a passport, and a wallet, limiting prosecutors' evidence for trial.
  • U.S. District Judge Margaret Garnett previously ruled in January that all backpack contents were admissible in Mangione's separate federal case, creating a split decision regarding evidence ahead of the September 8 state trial.
  • Prosecutors describe the notebook as a 'manifesto' detailing plans to kill UnitedHealthcare CEO Brian Thompson, which remains central evidence for Mangione's state trial expected to last four to six weeks beginning September 8.
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131 Articles

Lean Left

Critical evidence for the prosecution seized after the arrest of Luigi Mangione, accused of killing the boss of the largest American health insurance group, will be well examined in his first trial, decided on Monday a judge of the State of New York.

·Montreal, Canada
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Lean Right

Judge decided that part of the evidence in the case of the death of Brian Thompson, CEO of UnitedHealthcare, can be used against Luigi Mangione. Caderno is considered a kind of "manifesto" by the authorities.

·Portugal
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Las Vegas Sun broke the news in Las Vegas, United States on Monday, May 18, 2026.
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