Killing of UnitedHealthcare CEO has inspired followers, prosecutors say

Luigi Mangione, accused of fatally shooting the UnitedHealthcare CEO Brian Thompson in New York City and leading authorities on a five-day search, appears in court for a hearing, Feb. 21, 2025, in New York. (Steven Hirsch/New York Post via AP, Pool, File)

NEW YORK — 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.

Larry Neumeister, The Associated Press

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