Luigi Mangione Pleads Guilty to Federal Charges in CEO Murder Case

A Chilling Admission in Open Court

Nearly two years after gunning down UnitedHealthcare CEO Brian Thompson on a New York City street with a 3-D printed pistol, Luigi Mangione stood before a federal judge in Manhattan on Friday, August 14, and pleaded guilty to federal stalking charges as Thompson's family looked on. The moment was as stark as it was historic — a 28-year-old Ivy League graduate calmly confessing to a premeditated killing that shocked the nation and ignited a fierce national debate about the American healthcare system.

In his allocution to the court, Mangione revealed for the first time that in 2024 he posed as a potential investor who managed over $50 billion in assets and emailed leadership at the insurance giant to confirm the location of the investors conference so he could track Thompson's location. He told the court he used a 3-D printer to make part of the gun, equipped it with a silencer and a magazine, and traveled to New York with the explicit intent to shoot Thompson. "I shot Mr. Thompson in Manhattan and he died," he said, adding, "I knew what I was doing was illegal."

Motive, Evidence, and a Family's Pain

In the federal courtroom, Mangione outlined his stated motive, saying, "After years of enduring severe pain from a broken back ... I learned that UnitedHealthcare would be holding its annual investor conference in New York City." Prosecutors, however, have pushed back on that framing, arguing that Mangione was never actually a UnitedHealthcare customer. Among the most haunting pieces of evidence recovered at the scene were shell casings inscribed with the words "delay," "deny," and "depose" — a pointed reference to widespread criticism of how health insurers handle and reject claims.

Thompson, a 50-year-old father of two who oversaw the nation's largest healthcare insurer, was fatally shot on a New York City street in December 2024, setting off a five-day manhunt that ended with Mangione being taken into custody at a McDonald's restaurant in Pennsylvania. Thompson's widow and family were seated in the front row of the courtroom during Friday's plea hearing. In a rare statement, the Thompson family said, "Today's guilty plea marks an important step toward justice for Brian and for our family," adding that they were grateful "the federal justice system has held the person responsible for this heinous act accountable."

Sentencing and the Road Ahead

U.S. District Judge Margaret Garnett accepted the guilty plea, and Mangione's sentencing is set for December 18. He faces up to life imprisonment on two stalking charges because prosecutors allege the conduct resulted in Thompson's death, though life imprisonment is not mandatory — the judge could set a term of years. Judge Garnett informed Mangione that federal sentencing guidelines suggest approximately 24 to 30 years in prison, though she is not bound by those guidelines and can consider other factors. Despite the guilty plea, former federal prosecutor Berit Berger noted it is still "very likely" that the judge will sentence Mangione to life in prison or something close to it, particularly because there was no formal plea deal with federal prosecutors.

The federal guilty plea is expected to kick off a double jeopardy fight in state court, where Mangione still faces murder charges and the possibility of life in prison. In the state case, a judge last September dismissed first-degree murder and terrorism charges, but Mangione remains charged with second-degree murder, criminal possession of a forged instrument, and multiple weapons counts. A spokeswoman for Manhattan District Attorney Alvin Bragg, whose office is prosecuting Mangione in state court, said the office has "been tirelessly preparing to pursue a trial conviction in New York State Supreme Court for the alleged cold-blooded murder of Brian Thompson." That state trial is currently scheduled to begin September 8, setting up what could be months more of high-profile legal battles — and a continuing national reckoning over the intersection of healthcare frustration and violence.