Luigi Mangione pleaded guilty to federal stalking charges in August 2026 for the December 2024 murder of UnitedHealthcare CEO Brian Thompson, admitting in open court that he built a 3D-printed gun, tracked the executive to an investor conference, and shot him dead on a Manhattan street.
Thompson, 50, was gunned down on the morning of December 4, 2024, outside the Hilton in Midtown Manhattan, where UnitedHealth Group was holding its annual investor conference. The masked shooter fled on a bicycle; bullet casings at the scene were reportedly inscribed with the words 'delay,' 'deny,' and 'depose' — a reference to tactics critics attribute to health insurers denying claims. The killing detonated a national conversation about America's for-profit health insurance industry, with a disturbing wave of online commentary celebrating the shooter as a folk hero.
Five days later, Mangione, then 26, was arrested at a McDonald's in Altoona, Pennsylvania, after an employee recognized him from wanted posters. Police said he was carrying a 3D-printed 'ghost gun' with a suppressor, a fake ID, and a handwritten manifesto railing against the U.S. healthcare system. A University of Pennsylvania graduate from a prominent Maryland family, Mangione had reportedly suffered years of debilitating back pain, which he told the court drove him to the attack.
The prosecution unfolded on two tracks. Federal prosecutors initially charged murder, which would have made Mangione eligible for the death penalty — but in January 2026 Judge Margaret Garnett dismissed that charge as technically flawed, removing capital punishment from the table. On August 14, 2026, Mangione pleaded guilty to federal stalking charges with no deal or sentencing concession from prosecutors, who plan to seek life imprisonment at his December 18 sentencing. 'On the morning of Dec. 4, 2024, I shot Mr. Thompson in Manhattan, and he died,' he told the court matter-of-factly, as Thompson's widow Paulette wept in the audience.
The state case continues: Mangione has pleaded not guilty to second-degree murder in Manhattan, with that trial scheduled to begin in September 2026 and potentially adding a separate long sentence. His defense team withdrew a planned psychiatric defense in June and has pushed to have the proceedings broadcast live.
The case has become a cultural Rorschach test. Thompson's family called the plea 'an important step toward justice,' while Mangione's supporters — who raised large sums for his defense and packed his court appearances — see him as a symbol of rage at a system that bankrupts the sick. UnitedHealth, for its part, has faced intensified scrutiny of its claims practices. Whatever the final sentences, the murder of a CEO on a New York sidewalk has already secured its place as one of the most unsettling crimes of the decade.