Background
Brian Robert Thompson was an American business executive who served as chief executive officer of UnitedHealthcare, the insurance arm of UnitedHealth Group, one of the largest health insurance companies in the United States. He had worked at the company since 2004 and was named CEO of UnitedHealthcare in April 2021. He was 50 years old at the time of his death and lived in Minnesota with his family.
In early December 2024, Thompson traveled to New York City for UnitedHealth Group's annual investor day, scheduled to take place at the New York Hilton Midtown in Manhattan. The killing occurred against a backdrop of widespread public frustration in the United States over the health insurance industry, particularly disputes over claim denials. After the shooting, this discontent became a notable feature of public discussion surrounding the case.
The Killing
On the morning of December 4, 2024, Thompson was walking toward the New York Hilton Midtown on Sixth Avenue (Avenue of the Americas) when he was shot from behind by a masked gunman shortly before 7:00 a.m. He was struck multiple times and was pronounced dead at a nearby hospital. The attack was captured in part by surveillance cameras, which showed the assailant approaching on foot and firing before fleeing.
Investigators reported that words including 'deny,' 'defend,' and 'depose' were found written on shell casings or ammunition recovered at the scene. The phrasing was widely interpreted in media coverage as a reference to tactics associated with insurance claim handling, though the precise meaning attributed by the gunman remained a matter of interpretation. The shooter fled the area, initially on foot and then by bicycle, prompting an extensive multi-day manhunt across New York City.
Investigation and Arrest
New York City police released surveillance images of the suspect, including footage from a hostel where he had reportedly stayed. The investigation drew intense national media attention and a large law enforcement response. Authorities recovered items along the suspected escape route and pursued numerous tips from the public.
On December 9, 2024, five days after the shooting, Luigi Nicholas Mangione, then 26, was arrested at a McDonald's restaurant in Altoona, Pennsylvania, after an employee recognized him and alerted police. Officers reported recovering a firearm and a written document, sometimes described in coverage as a manifesto, expressing hostility toward the health insurance industry. Mangione, a graduate of the University of Pennsylvania from a prominent Maryland family, was taken into custody and subsequently charged.
Charges and Legal Proceedings
Mangione was charged in multiple jurisdictions. In Pennsylvania he initially faced charges including firearms and forgery offenses related to his arrest. In New York, he was charged with murder, including a state charge of first-degree murder and second-degree murder counts, with prosecutors later pursuing the killing as an act of terrorism under New York law. He was extradited to New York to face those charges.
Separately, federal prosecutors brought charges against Mangione, and the U.S. Department of Justice indicated it would seek the death penalty in the federal case. Mangione pleaded not guilty to the charges against him. As of mid-2025 the case remained ongoing, with proceedings in both the state and federal courts. Because the matter is unresolved, Mangione is presumed innocent unless and until proven guilty.
Public Reaction and Aftermath
The killing and Mangione's arrest generated unusually polarized public reaction. While Thompson's death was widely condemned, a segment of online commentary expressed sympathy for the alleged perpetrator or used the case to voice grievances about the U.S. health insurance system, a response that drew criticism from public officials and commentators who warned against glorifying violence. The phenomenon was widely covered as an example of public anger toward the industry.
Thompson was remembered by colleagues and family as a dedicated executive and father. UnitedHealth Group and other corporations reportedly reviewed security arrangements for senior leaders in the wake of the attack. The case prompted broader discussion about executive security, the health insurance industry, and online responses to violence. As legal proceedings continued, many specific facts remained subject to courtroom testing.
