Luigi Mangione Pleads Guilty to Federal Stalking, Admits to Murder of UnitedHealthcare Executive

Luigi Mangione pleaded guilty Friday in a Manhattan federal courtroom to two stalking charges connected to the December 2024 killing of UnitedHealthcare CEO Brian Thompson. In a hastily scheduled hearing, the 28-year-old admitted to tracking the executive to an investor conference and fatally shooting him on a New York City sidewalk. "On the morning of Dec. 4, 2024, I shot Mr. Thompson in Manhattan, and he died," Mangione told U.S. District Judge Margaret M. Garnett. The admission marks a dramatic turning point in a case that sparked a nationwide manhunt and ignited intense public debate over the practices of the American health insurance industry. Mangione, who entered the courtroom in a beige jail uniform with his feet shackled, answered "Yes" when the judge asked if he understood that his plea could result in him spending the rest of his life behind bars.[1][2]

The plea resolves the federal case against Mangione just weeks before he was scheduled to stand trial in state court on separate murder charges. Mangione pleaded guilty to one count of interstate stalking resulting in death and one count of cyberstalking through the use of interstate facilities resulting in death. Both charges carry a maximum penalty of life in prison. Earlier this year, a federal judge dismissed two additional charges, including murder through the use of a firearm, which had initially made Mangione eligible for the death penalty. The dismissal of the capital charges left the two stalking counts as the sole remaining federal offenses. By entering an open plea without a negotiated agreement, Mangione placed his sentencing entirely in the hands of the federal judge, avoiding a high-profile trial that was set to begin in January.[2][4]

During the hearing, Mangione detailed the extensive planning and subterfuge behind the attack. He admitted to using a 3D printer to manufacture a firearm component and attaching a silencer to the weapon before traveling from outside New York to carry out the shooting. He also described posing as an investor at a multibillion-dollar firm, emailing UnitedHealthcare leadership to confirm the location and details of the company's annual investor conference. "Unlike my previous interactions with insurers, I received an immediate response within an hour," Mangione stated in court. The meticulous preparation allowed him to locate Thompson outside a Midtown Manhattan hotel, where surveillance footage captured a masked gunman shooting the 50-year-old executive from behind.[1][6]

Mangione told the court he pursued Thompson "after years of enduring severe pain from a broken back, navigating the obstacles of the health insurance system and witnessing similar experiences of countless others." The shooting drew widespread attention after police revealed that the words "delay," "deny," and "depose" were written on the ammunition used in the attack—a reference to a phrase often used by critics to describe how insurance companies avoid paying claims. Despite his stated grievances against the "greed-fueled" health insurance industry, authorities confirmed Mangione was never a UnitedHealthcare customer. A University of Pennsylvania graduate from a wealthy Maryland family, Mangione's background contrasted sharply with the anti-corporate manifesto he allegedly carried, complicating the narrative surrounding his motives.[1]

The federal plea was an "open plea," meaning Mangione did not reach an agreement with prosecutors for a reduced sentence or any other concessions. U.S. Attorney Jamie McDonald stated that the government intends to seek the maximum penalty of life imprisonment at Mangione's sentencing, which is scheduled for December 18. "No grievance, political belief, or ideological cause can justify murder," McDonald said following the hearing. "With today's guilty plea, Mangione is being held accountable for a heinous crime that claimed an innocent life and drew national attention." The Justice Department emphasized that while the plea secures a conviction, it does not erase the devastating impact of the crime on the victim's family and the broader community.[2][4]

The guilty plea immediately triggered a strategic legal maneuver by Mangione's defense team to dismiss his pending state murder case. His attorneys argue that prosecuting him in both federal and state courts for the same underlying conduct constitutes double jeopardy. The state trial, which includes charges of second-degree murder and weapons offenses, is currently scheduled to begin in September. Defense attorney Karen Friedman Agnifilo filed a motion in state court shortly after the federal hearing, seeking to have the Manhattan District Attorney's case thrown out. The move sets up a complex jurisdictional battle over whether New York courts will view the state and federal cases as stemming from a single criminal transaction or as distinct offenses that can be prosecuted separately.[5]

New York's double jeopardy statute is notably broader than federal constitutional protections, generally barring a second prosecution if a defendant has already been convicted of a similar offense. However, the state law includes narrow exceptions, and the Manhattan District Attorney's office has indicated it is prepared to aggressively fight the dismissal motion. Prosecutors are expected to argue that the state murder charges address different elements and societal harms than the federal stalking convictions. If the state case proceeds, Mangione faces an additional sentence of 25 years to life in prison. The outcome of the double jeopardy challenge will determine whether Mangione must face a second trial or if the federal life sentence will serve as the final legal word on the assassination.[5][6]

Thompson's family, who attended the hearing and wiped away tears as Mangione described the killing, released a statement calling the plea "an important step toward justice." The executive's death in broad daylight sparked a frantic multistate manhunt that ended five days later when Mangione was recognized and arrested at a McDonald's in Altoona, Pennsylvania. "While nothing will ease the pain of losing him, we are grateful that the federal justice system has held the person responsible for this heinous act accountable," the family stated. They added that they look to the court to ensure the December sentencing reflects the severity of the crime, while remaining mindful that additional legal proceedings in New York and Pennsylvania are still pending.[5]