UnitedHealthcare CEO Shooting
Brian Thompson, the CEO of the American health insurance company UnitedHealthcare, was shot and killed in Midtown Manhattan, New York City, on December 4, 2024. The shooting occurred early in the morning outside an entrance to the New York Hilton Midtown. The suspect, initially described as a white man wearing a mask, fled the scene. The words "delay", "deny", and "depose" were inscribed on the cartridge cases used during the shooting. Thompson had previously faced criticism for the company's rejection of insurance claims, and his family reported that he had received death threats.
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Case overview
On December 4, 2024, [Brian Thompson](https://en.wikipedia.org/wiki/Killing_of_Brian_Thompson) — the 50-year-old CEO of UnitedHealthcare, the largest private health insurer in the United States — was allegedly shot and killed outside the New York Hilton Midtown hotel in Midtown Manhattan at approximately 6:45 a.m. According to law enforcement, Thompson was walking toward an annual investor conference when a masked gunman approached from behind and fired multiple rounds, striking him in the back and leg. The shooter then fled northward on an e-bike through Central Park, where a backpack was later found abandoned. Shell casings recovered at the scene were inscribed with the words "delay," "deny," and "depose" — a reference to a 2010 book by Rutgers law professor Jay Feinman documenting how insurance companies profit by delaying, denying, and defending against legitimate claims. The weapon was allegedly fitted with a 3D-printed homemade suppressor, and the killing was captured in full by hotel surveillance cameras.
UnitedHealthcare is the health insurance division of UnitedHealth Group, at the time the most valuable health company in the world with revenues exceeding $370 billion annually. The company covered approximately 50 million Americans. Thompson had led UnitedHealthcare since 2021. In the months before his death, the company had faced escalating public criticism for algorithmic systems that allegedly denied medical claims at unusually high rates, including care for cancer patients and individuals with terminal diagnoses. The shooting landed at the epicenter of a long-simmering national debate about private health insurance practices and patient rights.
A five-day national manhunt followed. Newly appointed NYPD Commissioner Jessica Tisch led the public-facing investigative effort, coordinating with the FBI and NYPD Chief of Detectives Joseph Kenny as detectives retraced the suspect's movements through Manhattan's extensive camera network. According to court records, investigators determined that the gunman had arrived in New York City by bus from Atlanta on November 24, 2024, and checked into a hostel on West 94th Street on November 25 under the name "Mark Rosario" — allegedly a false identity. On the morning of the shooting, he was captured on camera purchasing a coffee at a Starbucks near the hotel. DNA from a water bottle and a KIND bar wrapper discarded near the Starbucks were later used to help identify the suspect. NYPD and the FBI offered a combined $10,000 reward and circulated high-resolution surveillance still images nationally.
On December 9, 2024, a customer at a McDonald's in Altoona, Pennsylvania recognized the suspect from the widely-shared photos and alerted staff, who called police. Luigi Nicholas Mangione, then 26 years old, was arrested at the restaurant. Bullets from Mangione's bag were subsequently matched to casings recovered at the crime scene, and fingerprint analysis allegedly linked him to physical evidence recovered near the hotel. A 3D-printed ghost gun with a suppressor was also recovered, as well as a fake New Jersey ID in the name "Mark Rosario," a Greyhound bus ticket purchased under a false name, and a multi-page handwritten manifesto.
Mangione was valedictorian of his 2016 graduating class at the Gilman School, a prestigious all-boys prep school in Baltimore, Maryland. He subsequently graduated from the University of Pennsylvania in 2020 with both a bachelor's and a master's degree in engineering. He came from a prominent Baltimore family; his grandfather had founded Lorien Healthcare, a Maryland nursing home chain, and his cousin Nino Mangione serves in the Maryland House of Delegates. Mangione had no prior criminal record. According to public records and online posts, he had suffered from debilitating back pain and underwent spinal surgery in late 2023, after which he reportedly severed contact with friends and family. His handwritten manifesto, portions of which were disclosed in court proceedings, characterized the U.S. health insurance industry as "an unneeded, parasitic influence on our society" and framed the alleged killing as a political act, naming UnitedHealthcare by name and alleging "abuse, negligence, and greed" as motivation. Police noted the manifesto bore similarities in tone to the writings of Ted Kaczynski.
The public reaction was unlike almost any homicide case in recent American history. While law enforcement officials and political figures condemned the murder, social media was flooded with expressions of sympathy and even admiration for the suspect. The divergence between official condemnation and popular sentiment reflected deep anger at the American healthcare system and its denial-of-claims practices.
On the legal front, [a Manhattan grand jury indicted Mangione on 11 counts on December 17, 2024](https://www.cnn.com/2024/12/17/us/luigi-mangione-ceo-shooting/index.html), including first-degree murder charged as an act of terrorism under New York law. He was extradited to New York from Pennsylvania on December 19, and arraigned on December 23, 2024, pleading not guilty to all charges. In April 2025, a federal grand jury separately indicted Mangione on charges including murder through use of a firearm, stalking resulting in death, and related federal counts — charges that originally carried the potential for the federal death penalty. He pleaded not guilty to all federal charges on April 25, 2025. In September 2025, a New York state judge dismissed the terrorism-related first-degree murder count, according to court records, leaving second-degree murder as the lead charge in the state case. On January 30, 2026, federal Judge Analisa Torres dismissed the death-eligible murder charge, ruling that the government had failed to adequately allege the required racketeering nexus. The New York State murder trial is scheduled to begin June 8, 2026. Federal jury selection in the remaining stalking counts is scheduled for September 2026.
Mangione is represented by defense attorneys Thomas Dickey and Marc Agnifilo; Karen Friedman Agnifilo, known for her prior work as a senior prosecutor, joined the defense team. The Manhattan District Attorney's office, led by Alvin Bragg, is handling the state prosecution. Mangione has pleaded not guilty to all charges and is charged with, but has not been convicted of, any crime in connection with the death of Brian Thompson.
Arrest & Charges
[Luigi Mangione was arrested on December 9, 2024, in Altoona, Pennsylvania](https://apnews.com/article/unitedhealthcare-ceo-shot-killed-brian-thompson-1e3b449dd9ed5fabeb2ad592fde91575), five days after the shooting. He faces criminal proceedings in two separate jurisdictions — New York State and federal court — and was extradited to New York to face state charges.
State Proceedings (New York)
[A Manhattan grand jury indicted Mangione on 11 counts on December 17, 2024](https://www.cnn.com/2024/12/17/us/luigi-mangione-ceo-shooting/index.html), including first-degree murder in furtherance of terrorism, second-degree murder, and weapons charges. He pleaded not guilty at his December 23 arraignment. On September 16, 2025, Judge Gregory Carro dismissed the two terrorism-related murder charges, finding them legally insufficient; second-degree murder and remaining counts continue. A three-week suppression hearing concluded December 18, 2025, with the defense seeking to exclude the ghost gun, silencer, and handwritten notebook recovered at arrest; Judge Carro is expected to rule in May 2026. The state trial is scheduled to begin June 8, 2026.
Federal Proceedings
Federal prosecutors charged Mangione in December 2024 with murder through use of a firearm — a death-eligible offense — along with two stalking counts and a related firearms charge. A federal grand jury issued a formal indictment in April 2025; Mangione pleaded not guilty on April 25, 2025. On January 30, 2026, U.S. District Judge Margaret Garnett dismissed the death-eligible murder count, ruling that stalking does not qualify as a predicate crime of violence under the applicable federal statute. On February 27, 2026, prosecutors confirmed they would not appeal. Two stalking counts remain, each carrying a maximum of life imprisonment without parole. The federal trial is scheduled with jury selection September 8, 2026, and opening statements October 13, 2026.
Current Status
Mangione has pleaded not guilty to all charges and is not known to be in plea negotiations. He will not face the death penalty — New York abolished capital punishment in 2004, and the federal death-eligible charges have been dismissed and will not be appealed.
March 9, 2026
Defense Challenges Federal Learned Counsel Designation
In a March 9, 2026 letter to U.S. District Judge Margaret Garnett, federal prosecutors responded to the court's request regarding whether defense attorney Avi Moskowitz should remain as "learned counsel" — a designation typically reserved for attorneys with capital case experience — following the dismissal of death-eligible charges.
Source →February 27, 2026
Federal Prosecutors Decline to Appeal Death Penalty Ruling
Deputy U.S. Attorney Sean Buckley notified the court that federal prosecutors would not ask the U.S. Court of Appeals for the Second Circuit to review Judge Garnett's January 30 ruling dismissing the death-eligible charges. The decision makes Mangione's removal from death penalty consideration final in the federal case. His federal trial on two stalking counts proceeds on the October 13 schedule.
Source →February 6, 2026
New York State Murder Trial Scheduled for June 8, 2026
Judge Gregory Carro set the New York state murder trial to begin June 8, 2026, accepting the Manhattan District Attorney's request to schedule the state trial before the federal proceeding. The state trial date places Mangione's two cases just months apart — state trial begins June 8, federal jury selection begins September 8. Mangione reportedly voiced an objection in open court as the date was announced.
Source →January 30, 2026
Federal Judge Dismisses Death-Eligible Murder Charge
U.S. District Judge Margaret Garnett dismissed the death-eligible murder count and a related firearms charge from Mangione's federal indictment, ruling that stalking — the predicate offense — does not qualify as a 'crime of violence' under the applicable statute. Two federal stalking counts remain, each carrying a maximum of life imprisonment without parole. Judge Garnett set the federal trial schedule: jury selection September 8, 2026; opening statements October 13, 2026.
Source →January 9, 2026
Defense Moves in Federal Court to Dismiss Death-Eligible Charges
Luigi Mangione appeared in Manhattan federal court for a pivotal hearing at which his attorneys argued for dismissal of two of the four federal counts: the death-eligible murder charge and a related firearms offense. U.S. District Judge Margaret Garnett said she would consider the motions and set the next hearing for January 30. At the conference, Judge Garnett indicated jury selection for the federal trial would begin in September 2026.
Source →December 18, 2025
State Evidence Suppression Hearing Concludes After Three Weeks
A three-week evidence suppression hearing in New York state court concluded on December 18, 2025. Over nine days of testimony, 17 witnesses testified about the circumstances of Mangione's arrest and police questioning. The defense sought to exclude the ghost gun, homemade silencer, handwritten notebook, and statements Mangione made to police, arguing constitutional violations. Judge Gregory Carro gave the prosecution until March 5, 2026 to file final written arguments, with a ruling on admissibility expected in May 2026.
Source →September 16, 2025
New York Judge Dismisses First-Degree Terrorism Murder Charge
A New York State judge dismissed the most serious charge against Mangione — first-degree murder as an act of terrorism — ruling the prosecution had not sufficiently alleged the terrorism nexus. Second-degree murder remained the lead charge.
Source →April 25, 2025
Mangione Arraigned on Federal Charges, Pleads Not Guilty
Luigi Mangione appeared before a federal judge at the Thurgood Marshall United States Courthouse and pleaded not guilty to all federal charges. This marked his formal entry of plea in the federal prosecution.
Source →December 23, 2024
Mangione Pleads Not Guilty in New York Supreme Court
Luigi Mangione was arraigned in New York Supreme Court and pleaded not guilty to all 11 state charges including first-degree murder in furtherance of terrorism, second-degree murder, and criminal possession of weapons. His defense attorney requested expedited discovery.
Source →December 19, 2024
Extradited to New York
Mangione was extradited to New York City to face state charges including first-degree murder.
Source →December 19, 2024
Federal Complaint Charges Mangione with Death-Eligible Murder
Federal prosecutors filed a complaint charging Mangione with four federal crimes, including one count of murder through the use of a firearm — a death-penalty eligible charge — along with criminal possession of a firearm and two counts of stalking.
Source →Marc Agnifilo
Defense Co-Counsel
Marc Agnifilo is a veteran criminal defense attorney and co-founder of Agnifilo Intrater LLP. He serves as co-lead defense counsel for Luigi Mangione alongside his wife Karen Friedman Agnifilo. He has represented clients in many high-profile cases including Sean Combs, Keith Raniere of NXIVM, and Martin Shkreli. He is a former Manhattan ADA and federal prosecutor with over 200 jury trials.
Alvin Bragg
Manhattan District Attorney
Alvin L. Bragg Jr. is the 37th District Attorney of Manhattan, elected in 2021 as the first African American to hold the office. His office is prosecuting Luigi Mangione on state murder charges in the killing of UnitedHealthcare CEO Brian Thompson. The state trial is scheduled for June 8, 2026.
Brian Thompson
UnitedHealthcare CEO; shot outside shareholder meeting in New York City
Brian Thompson, born 1974 in Iowa, was the CEO of UnitedHealthcare, the health insurance arm of UnitedHealth Group — the largest private health insurer in the United States. Thompson joined UnitedHealth Group in 2004 and rose through senior leadership roles before being named CEO of UnitedHealthcare in 2021. He was known as a low-profile executive despite leading a company with revenues exceeding $200 billion annually. He was shot and killed outside the New York Hilton Midtown on December 4, 2024, as he arrived for an investor conference.
Luigi Mangione
Alleged perpetrator of the December 4, 2024 targeted shooting of UnitedHealthcare CEO Brian Thompson outside Midtown Manhattan hotel. Arrested December 9, 2024 in Altoona, PA. Pleaded not guilty.
Luigi Nicholas Mangione, born 1997, graduated summa cum laude from the University of Pennsylvania in 2020 with bachelor's and master's degrees in computer science and mathematics. Raised in a prominent Baltimore, Maryland family; his grandfather Nicholas Mangione was a successful real estate and hospitality entrepreneur. Mangione had worked in tech, including a role at TrueCar, before leaving to travel internationally. He suffered from severe degenerative spinal disease and underwent lumbar spinal fusion surgery in 2023. At the time of his arrest he had no prior criminal record.
Joel Seidemann
Lead Assistant District Attorney on the Manhattan state murder case
Joel Seidemann is a veteran prosecutor with the Manhattan District Attorney's office handling the state murder case against Luigi Mangione. He argued in court that the state trial should proceed before the federal case, noting that Brian Thompson's mother specifically requested the state prosecution — the only proceeding where first-degree murder in furtherance of terrorism could result in life without parole.
Thomas Dickey
Defense attorney for Pennsylvania charges
Thomas Dickey is a Pennsylvania-based criminal defense attorney retained by Luigi Mangione to handle the charges filed against him in Altoona, Pennsylvania following his arrest on December 9, 2024.
Karen Friedman Agnifilo
Lead defense attorney for Luigi Mangione in the UnitedHealthcare CEO murder case. Former Chief Assistant District Attorney under Manhattan DA Cyrus Vance Jr., she transitioned to criminal defense and is a partner at Agnifilo Intrater LLP.
Breon Peace
Breon Peace served as US Attorney for the Eastern District of New York. In December 2024, federal prosecutors under his office filed charges against Luigi Mangione including murder in aid of racketeering, with death-eligible counts. The federal death penalty charge was ultimately dismissed in January 2026.
Jessica Tisch
NYPD Commissioner Jessica Tisch, who had taken office just weeks before the shooting in November 2024, oversaw the department's response to the killing of Brian Thompson and the subsequent five-day manhunt. She appeared at press conferences alongside Chief of Detectives Kenny to announce the arrest of Luigi Mangione.
Ghost gun with matching ballistics
A 3D-printed "ghost gun" was found on Mangione at arrest. Ballistic analysis confirmed it as the weapon used to shoot Brian Thompson.
Manhattan District Attorney's Office, Dec 8 2025Surveillance footage — Midtown shooter
Extensive CCTV footage captured the shooter near the New York Hilton Midtown before and after the shooting. The footage was widely circulated and helped generate tips.
Wikimedia Commons — CCTV security camera footage (public domain)Shell Casings Inscribed "Delay," "Deny," "Depose"
Three .9mm shell casings recovered at the Hilton Midtown crime scene each bore handwritten inscriptions: "delay," "deny," and "depose." These words reference the title of a 2010 book by Rutgers law professor Jay Feinman documenting how insurance companies systematically deny valid claims. The inscriptions were widely interpreted as a political message targeting the healthcare insurance industry, and became central to the prosecution's murder-as-terrorism argument.
theguardian.comDNA Profile from Starbucks Water Bottle
Investigators recovered a water bottle discarded by the suspect at a Starbucks near the Hilton hotel on the morning of December 4, 2024 — hours before the shooting. DNA extracted from the bottle was used to develop a genetic profile of the suspect. When Mangione was arrested in Pennsylvania, his DNA was matched to this profile, providing a critical forensic link between him and the pre-shooting surveillance footage.
nbcnews.comHandwritten Manifesto — "An Unneeded, Parasitic Influence"
A multi-page handwritten manifesto recovered from Mangione's possession at the time of his Pennsylvania arrest laid out his alleged political motivation for the killing. Portions disclosed in court filings characterized the U.S. health insurance industry as "an unneeded, parasitic influence on our society" and named UnitedHealthcare specifically, accusing the company of "abuse, negligence, and greed." The manifesto framed the killing as a political act rather than a personal grievance, and became central to both the terrorism charge (since dismissed) and the public cultural debate around the case.
CBS News — court exhibit released Dec 2025Backpack Containing Suppressor, Magazine, and Bus Ticket
A backpack recovered from Mangione at the time of his arrest in Altoona, PA contained a 3D-printed suppressor consistent with the one used in the shooting, an additional loaded magazine, a Greyhound bus ticket purchased under the false name "Sam Dawson," and a handwritten to-do list. Court testimony described the items in detail during the December 2025 pre-trial suppression hearing.
Wikimedia Commons — US DOJ federal complaint (public domain)KIND Bar Wrapper and Water Bottle — Fingerprint Evidence
Investigators recovered a KIND bar wrapper and a water bottle discarded near the Starbucks on West 54th Street. According to court testimony, five fingerprints on the water bottle and two on the KIND bar wrapper matched Luigi Mangione's prints, corroborating the DNA evidence. Both items were purchased by the suspect approximately 30 minutes before the shooting.
cbsnews.comFake ID in the name 'Mark Rosario'
Mangione used a fake New Jersey ID to check into a hostel in Manhattan. The same alias was used at several locations in the days before the shooting.
Altoona Police via Manhattan DA's Office, Dec 4 2025Indictments
2Luigi Mangione — NY State Indictment (December 17, 2024)
New York State grand jury indictment filed December 17, 2024, charging Luigi Mangione with murder in the first degree.
Luigi Mangione — Federal Indictment (SDNY)
Federal indictment filed in the Southern District of New York charging Luigi Mangione with murder of UnitedHealthcare CEO Brian Thompson.
Other
1Luigi Mangione — NY State Criminal Complaint (Dec 2024)
New York State criminal complaint filed against Luigi Mangione in December 2024 for the murder of Brian Thompson.

