Killing of UnitedHealthcare CEO has inspired followers, prosecutors say

NEW YORK (AP) — Prosecutors say Luigi Mangione, accused of killing the CEO of UnitedHealthcare on a Manhattan sidewalk, has inspired others to embrace violence over reasoned debate.

As evidence of Mangione’s growing influence, prosecutors cited the last month’s deadly mass shooting at the National Football League headquarters.

The prosecution outlined the threat in a filing late Wednesday on a procedural matter in federal court in Manhattan, where they plan to try to convince a jury that Mangione deserves death. No federal trial date has been set.

Mangione, who pleaded not guilty to state and federal charges, was arrested five days after the Dec. 4 killing of CEO Brian Thompson. He is being held without bail in a federal jail in Brooklyn.

U.S. Attorney General Pam Bondi announced in April that she was directing federal prosecutors to seek the death penalty for “an act of political violence” and a “premeditated, cold-blooded assassination that shocked America.”

In their filing Wednesday, prosecutors wrote that Mangione poses a continuing danger in part because he seeks to influence others.

“Simply put, the defendant hoped to normalize the use of violence to achieve ideological or political objectives,” they said. “Since the murder, certain quarters of the public — who openly identify as acolytes of the defendant — have increasingly begun to view violence as an acceptable, or even necessary, substitute for reasoned political disagreement.”

In a footnote, prosecutors referenced the gunman who went into an office building not far from where Thompson was shot in midtown Manhattan, then killed four people including an off-duty police officer, a financial services firm executive and a security guard, and wounded others, including an NFL employee.

Mangione is accused of leaving behind evidence showing disdain for the insurance industry. Similarly, the NFL headquarters gunman identified as Shane Tamura left behind a handwritten note blaming the league and football for causing chronic traumatic encephalopathy, known at CTE, prosecutors noted.

Tamura, who took his own life, accused the league of hiding the dangers of brain injuries linked to contact sports.

“Almost immediately, members of the public sympathetic to the defendant touted Tamura’s actions as a laudable continuation of the defendant’s philosophy,” prosecutors said.

Prosecutors said Mangione has “openly cultivated supporters” by setting up a website and directly addressing them. They said Mangione also has catalogued all of the supportive letters he has received on his website.

___

Associated Press Writer Michael R. Sisak contributed to this report.

FILE – Members of the New York police crime scene unit photograph bullets lying on the sidewalk as they investigate the scene outside the Hilton Hotel in midtown Manhattan where Brian Thompson, the CEO of UnitedHealthcare, was fatally shot, Dec. 4, 2024, in New York. (AP Photo/Stefan Jeremiah, File)
FILE – Flower wreaths with the words “Rest In Peace” stand at a vigil for the four people killed in the previous day’s shooting at 345 Park Avenue, including NYPD officer Didarul Islam, in Bryant Park, July 29, 2025, in New York. (AP Photo/Angelina Katsanis, File)
This undated image provided by Nevada Department of Motor Vehicles shows Shane Tamura. (Nevada Dept. of Motor Vehicles via AP, File)

News from © The Associated Press, . All rights reserved.
This material may not be published, broadcast, rewritten or redistributed.

Join the Conversation!

Want to share your thoughts, add context, or connect with others in your community?

The Associated Press

The Associated Press is an independent global news organization dedicated to factual reporting. Founded in 1846, AP today remains the most trusted source of fast, accurate, unbiased news in all formats and the essential provider of the technology and services vital to the news business. More than half the world’s population sees AP journalism every day.