Guilty Plea in Federal Stalking Case Over Thompson Killing

Luigi Mangione pleaded guilty in Manhattan federal court on Friday to two federal stalking charges related to the killing of UnitedHealthcare CEO Brian Thompson, reversing his earlier not-guilty plea. In court, Mangione told US District Judge Margaret Garnett that he shot Thompson on December 4, 2024, that he knew the act was illegal, and that he understood it would put Thompson in fear of death or serious injury.

The plea covers the federal case charging Mangione with stalking Thompson before the shooting outside a Manhattan hotel. Judge Garnett set sentencing for December 18. Each federal stalking charge carries a maximum possible sentence of life in prison, plus fines and restitution to Thompson's family. Mangione will remain in federal custody in Brooklyn until sentencing.

Separately, the Manhattan district attorney's office has scheduled a state murder trial for September 8. Mangione has pleaded not guilty in that case, and after Friday's hearing his lawyers filed a motion asking Justice Gregory Carro to dismiss the remaining state charges on double-jeopardy grounds. The defense argues it is unfair to pursue two prosecutions over what they call a single event.

The killing and five-day manhunt drew intense public attention, with some supporters depicting Mangione as a symbol of frustration with health insurers. In his courtroom statement, Mangione criticized UnitedHealthcare's investor conference and described gaining access by posing as an investor. Thompson's family said the guilty plea was an important step toward justice, while UnitedHealthcare thanked law enforcement and said nothing can ease the family's loss.

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What the Plea Means for Mangione’s Two Criminal Cases

Friday's plea resolves the federal stalking case but does not end Mangione's legal exposure. The most significant dispute is now procedural: whether the state murder prosecution can continue.

The Federal Plea Accepts Responsibility Without Admitting a Federal Murder Charge

The federal counts are stalking offenses, not murder. Mangione admitted to conduct that led to Thompson's death, and the charges carry a possible life sentence. The earlier federal murder and firearms counts, which were death-eligible, had been dismissed by Judge Garnett. By pleading guilty, Mangione avoids a federal trial and any renewed death penalty exposure in that case, while leaving the severity of punishment to the judge at the December 18 sentencing.

Why the Double-Jeopardy Motion Matters for the State Murder Trial

Mangione's defense is asking the state judge to throw out the Manhattan murder charges. The argument is that the state and federal cases arise from the same act and should not proceed separately. That claim faces a legal hurdle: under the US system, separate state and federal prosecutions are generally allowed. The motion may nonetheless force the state court to address how the federal guilty plea and upcoming sentence affect the remaining trial, and it could delay or shape the September case even if the murder charges survive.

The Courtroom Statement Reopens a Broader Debate About Health Insurance

Mangione used his plea hearing to criticize UnitedHealthcare, describing an investor conference attended by executives and investors rather than patients, and claiming he received a quick response when he posed as an investor. His lawyer linked the actions to years of back pain and frustration with the insurance system. Prosecutors and the NYPD commissioner rejected any suggestion that grievance justifies violence. The case has become a flashpoint for anger at the healthcare system, but Friday's proceeding focused on legal accountability rather than policy outcomes.