Prison guard says Luigi Mangione, alleged CEO killer, spoke of 3D-printed gun
Luigi Mangione, who was arrested in December 2024 and charged with fatally shooting UnitedHealthcare CEO Brian Thompson on a sidewalk in Midtown Manhattan, sits beside lawyer Marc Agnifilo during state court hearings over whether prosecutors can use his police statements at his murder trial in New York City, U.S., December 1, 2025 in this courtroom sketch. REUTERS/Jane Rosenberg