(File Photo: Source for Photo: Luigi Mangione attends a pre-trial hearing at Manhattan Criminal Court in New York, Tuesday, Aug. 11, 2026. (David Dee Delgado/Pool Photo via AP)

NEW YORK (AP) — Luigi Mangione pleaded guilty on Friday to federal stalking charges in the killing of UnitedHealthcare CEO Brian Thompson, admitting matter-of-factly that he trailed the executive to an investor conference and gunned him down on a New York City street in 2024.

Mangione, 28, said he made a gun with the aid of a 3D printer, traveled to New York and used a ruse — posing as an investor at a multibillion-dollar firm — to contact the company for details on the event.

“On the morning of Dec. 4, 2024, I shot Mr. Thompson in Manhattan, and he died,” Mangione told the Manhattan federal court, which he entered shackled at the feet but not handcuffed in his beige jail uniform.

Listening in the audience, Thompson’s wife, Paulette, took several deep breaths and repeatedly wiped tears from her eyes.

Prosecutors plan to seek a life prison term at Mangione’s sentencing, set for Dec. 18. When U.S. District Judge Margaret M. Garnett asked whether he understood that he could spend the rest of his life behind bars, Mangione answered neutrally: “Yes.”

In a statement, Thompson’s family called the plea “an important step toward justice” and noted that Mangione still faces other cases, including a New York state murder prosecution. It carries the potential for a separate long sentence.