Mangione pleads guilty in federal case over Thompson killing

An admission that reshapes two prosecutions

Luigi Mangione admitted in Manhattan federal court on Friday that he shot and killed UnitedHealthcare chief executive Brian Thompson in December 2024. He pleaded guilty to two federal stalking counts, telling the court he knew his conduct was illegal.cnn +1 The plea came without an agreement with prosecutors and weeks before jury selection was due to begin in a separate New York murder trial.apnews

Mangione, 28, described posing as an investor to obtain details about UnitedHealthcare's Manhattan conference, then traveling to New York with a gun partly made using a 3D printer. He said years of severe back pain and his experience with the health-insurance system drove his actions.cnbc +1 Thompson's relatives, seated in the courtroom, became emotional as Mangione recounted the planning and killing.cnn

A life sentence remains on the table

U.S. District Judge Margaret Garnett scheduled sentencing for December 18. Each stalking charge can carry a life sentence because the conduct resulted in Thompson's death, although prosecutors' calculation of federal guidelines points to roughly 24 to 30 years.cnn +1 Those guidelines are advisory, and the judge said she alone would determine the appropriate punishment.apnews

Federal prosecutors intend to seek life imprisonment. Because there was no plea deal, they made no sentencing concession, leaving Mangione's lawyers to argue for a term below life through written submissions and a probation report.cnbc +1 Thompson's family called the plea an important step toward justice and urged the court to impose a sentence reflecting the severity of the crime.cnbc

The state case moves into a legal fight

Minutes after the federal plea, Mangione's lawyers asked a state judge to dismiss the second-degree murder and weapons charges. They argue that New York's broader double-jeopardy protections bar another prosecution arising from the same act; the defense did not seek dismissal of a forged-identification charge tied to a different date and place.cnn

The Manhattan district attorney's office says it is prepared to contest that motion. State prosecutors maintain that their murder and firearms allegations contain legal elements distinct from federal stalking charges, including the interstate conduct underlying the federal case.apnews The state trial is scheduled for September 8, but the judge's ruling — and likely appeals — could delay or cancel it.

The plea also gives state prosecutors a direct admission that could be used if the case survives. It follows earlier rulings allowing evidence that included surveillance video, DNA and fingerprints, a 3D-printed pistol recovered at Mangione's arrest, and a notebook in which prosecutors said he expressed willingness to kill a healthcare executive.apnews The immediate question is no longer who carried out the shooting, but whether New York may prosecute it after the federal conviction.