NEW YORK, NY – Luigi Mangione, the 26-year-old Ivy League graduate accused of the brazen daylight murder of UnitedHealthcare CEO Brian Thompson, today entered a plea of not guilty to a federal murder charge. The arraignment, held in a packed Manhattan federal courtroom, marks a significant step in the legal proceedings against Mangione, who is also facing separate state murder charges in connection with the high-profile killing.
Mangione, clad in a mustard-colored jail jumpsuit, stood impassively alongside his defense team as U.S. District Judge Margaret Garnett read the indictment. When asked to enter his plea, Mangione leaned towards the microphone and stated clearly, “Not guilty.”
The federal indictment mirrors the state charges, accusing Mangione of stalking and the use of a firearm in the December 4th assassination of Thompson, 50, outside a Manhattan hotel. Thompson was arriving for a UnitedHealthcare investor conference when he was gunned down by a masked assailant.
The federal case carries the potential for the death penalty, a point underscored by U.S. Attorney General Pam Bondi’s recent announcement that federal prosecutors would seek capital punishment. Bondi had described the killing as a “premeditated, cold-blooded assassination that shocked America” and an “act of political violence,” citing alleged anti-insurance industry sentiments found in Mangione’s possession.
Defense attorneys have vehemently criticized the Attorney General’s decision, arguing that it constitutes a “political stunt” that has tainted the grand jury process and jeopardized Mangione’s right to a fair trial. They had previously sought to block the pursuit of the death penalty.
The courtroom was filled with onlookers, including former Army intelligence analyst Chelsea Manning, a controversial figure who served prison time for leaking classified diplomatic cables. Her presence added another layer of intrigue to the already highly charged proceedings.

While the federal case now moves forward, Mangione also faces state murder and weapons charges. Prosecutors have indicated that the state case is expected to proceed first, carrying a maximum sentence of life in prison. However, Mangione’s defense team has stated their intention to argue for the federal case to take precedence due to the potential for capital punishment.
The killing of Thompson and the subsequent five-day nationwide manhunt for Mangione sent shockwaves through the corporate world, particularly within the health insurance industry. Authorities allege that Mangione had a 9mm handgun matching the weapon used in the shooting, along with a notebook expressing hostility towards the health insurance industry and wealthy executives. Disturbingly, ammunition found at the scene was reportedly inscribed with the words “delay,” “deny,” and “depose” – terms often associated with insurance claim disputes.
As the legal battle unfolds on two fronts, the case of Luigi Mangione promises to be a complex and closely watched affair, raising fundamental questions about motive, justice, and the intersection of personal grievances and violent acts. The “not guilty” plea sets the stage for what is likely to be a protracted and emotionally charged legal process.