Luigi Mangione has changed his position before the American Justice. The 28-year-old has pleaded guilty in federal court in Manhattan to two counts of interstate harassment resulting in death related to the murder of UnitedHealthcare CEO Brian Thompson in New York in December 2024.
During the hearing, Mangione admitted before Judge Margaret Garnett that he shot Thompson and that he was aware that his actions constituted a crime. The admission represents a change with respect to its previous strategy and allows the federal procedure to be closed without having to hold the trial initially planned.
The sentence will not be handed down immediately. Mangione could face up to life in prison on the federal charges, and the judge has set a sentencing hearing for December 18.
Two judicial proceedings for the same murder
The guilty plea does not end all proceedings against Mangione. The defendant continues to face a separate trial before New York State Justice for Thompson’s murder.
The 50-year-old UnitedHealthcare executive was shot dead on December 4, 2024, outside a Manhattan hotel while addressing a UnitedHealth Group investor conference. Mangione was arrested five days later in Altoona, Pennsylvania. At the time of his arrest, the Police found among his belongings a weapon, a charger and other objects that were later incorporated into the investigation.
The state trial is scheduled to begin September 8. Mangione has pleaded not guilty to the state charges, so his recent admission of responsibility before federal Justice now opens a new legal dispute over the future of that procedure.
The scope of the guilty plea
Mangione has not pleaded guilty to a federal murder charge. The charges he has admitted are two crimes of harassment resulting in death: one related to interstate movement and another with the use of interstate means of communication.
The federal murder charge had undergone changes during the trial. In January 2026, a judge rejected federal charges that could have led to the death penalty, so the procedure focused on harassment crimes.
Federal legislation provides for a maximum penalty of life imprisonment for these crimes. Judge Garnett has also warned that Mangione must serve a substantial part of the sentence that is finally established, in accordance with federal sentencing standards.
The murder that caused a wide impact in the United States
Thompson’s death generated an intense public reaction and made Mangione a high-profile figure. The case also sparked debate about the American healthcare system and the relationship between private insurers and consumers, although authorities have treated the murder as an individual criminal case.
Federal prosecutors initially sought the death penalty for Mangione, considering the murder premeditated. Then-Attorney General Pamela Bondi announced in April 2025 that the Justice Department would seek that penalty.
Subsequently, the federal case underwent modifications and the death penalty was no longer on the table. This Friday’s guilty plea now represents a new turning point in a process that has been marked by successive legal confrontations between the defense and the federal and state prosecutors’ offices.
The declaration may affect the state trial
One of the main questions after Mangione’s appearance is what consequences his federal conviction will have on the process he keeps open in New York.
The defense maintains that subjecting the accused to separate proceedings for essentially linked events could conflict with the guarantees against double criminal prosecution. However, the so-called “dual sovereignty” doctrine in the United States allows federal and state governments to exercise their own jurisdiction over certain crimes, although the application of this principle may be disputed in specific circumstances.
For now, the state trial remains scheduled for September. The resolution of this issue will determine whether Mangione will also have to answer before the New York Justice for the murder charge that remains pending.
With his statement this Friday, Mangione has formally acknowledged before a federal court his responsibility in the events that led to Thompson’s death. However, the judicial process of the case has not yet ended.
