In a high‑profile case, Luigi Mangione, an Ivy League graduate from a prominent Maryland family, is being tried in the state court for the shooting death of Brian Thompson, the chief executive of UnitedHealthcare, who was killed on December 4, 2024 in Midtown Manhattan.

During a hearing in New York, Judge Gregory Carro was informed that Mangione’s attorneys plan to present a psychiatric defence. They will argue that he suffered from an extreme emotional disturbance at the time of the incident, a claim that could reduce the crime from murder to manslaughter if a jury accepts it.

A conviction as manslaughter would carry a substantially lighter sentence than a murder conviction, which could shift potential penalties from life imprisonment to imprisonment for a shorter period.

Mangione has pleaded not guilty in both federal and state cases. Federal charges, including violent assault and firearms offences, were dropped earlier this year, but he still faces federal stalking charges that carry a maximum penalty of life in prison.

The judge announced that court records related to the defence’s plan would be unsealed, allowing the public to review the details. Mangione was scheduled for a court appearance on Tuesday, which was cancelled after a pro‑secution error.

The state trial is slated to begin on September 8, 2026, with jury selection underway; final determination of the outcome will depend on whether the psychiatric defence is accepted by the jury.

Luigi Mangione in courtroom