The Morning Brian Thompson Was Shot
At 6:45am on December 4, 2024, UnitedHealthcare CEO Brian Thompson walked toward the Hilton Midtown hotel in Manhattan for the company’s annual investor conference. Moments later, a masked gunman approached from behind and shot him three times.
The shooter vanished into Central Park on a bicycle before disappearing completely. Police found shell casings at the scene engraved with three words: “Delay. Deny. Depose.” For millions of Americans trapped inside the country’s healthcare system, the message landed like a declaration.
The Injury That Changed Everything
The man accused of carrying out the killing did not fit the profile Americans expected.
Luigi Mangione was a University of Pennsylvania graduate with degrees in computer science and engineering. He came from a wealthy Maryland real estate family whose empire included nursing homes, the very kind of facility that depends on the insurance system he allegedly targeted. He graduated high school as valedictorian, built apps, worked in tech, surfed in Hawaii, and appeared destined for Silicon Valley success.
Then his health collapsed.
Mangione suffered from spondylolisthesis, a severe spinal condition that reportedly left him in chronic pain and eventually required surgery involving metal screws and spinal reinforcement. Friends described him withdrawing as the pain worsened. By summer 2024, he had disappeared almost entirely from public life. Months later, prosecutors say he resurfaced with a plan.
The Notebook Prosecutors Say Explains Everything
After a five-day manhunt, Mangione was arrested inside a McDonald’s in Altoona, Pennsylvania.
Police allegedly recovered a partially 3D-printed ghost gun, a suppressor, fake identification documents, and a red spiral notebook that has now become the centrepiece of the prosecution’s case.
In one handwritten entry from August 2024, prosecutors say Mangione wrote: “I finally feel confident about what I will do.” Another allegedly described the insurance industry as “the target” because it “checks every box.”
Investigators also found a Goodreads review Mangione had posted praising Ted Kaczynski’s manifesto, giving it four stars and writing it was “simply impossible to ignore how prescient many of his predictions about modern society turned out.”
A judge ruled on May 18, 2026 that the notebook and firearm could be admitted as evidence at trial, despite suppressing other items recovered during the arrest due to constitutional search concerns.
Why Millions Related To His Anger
The most unsettling part of the Luigi Mangione case is not the killing itself. It is the reaction that followed.
Social media flooded with stories from Americans describing denied claims, medical debt, delayed surgeries, and family members who suffered after insurance refusals. Protesters carried “Free Luigi” signs outside courthouses. Supporters raised more than $1.4 million for his legal defence. His prison received nearly 6,000 letters, most containing personal healthcare horror stories from strangers who had never met him.
Some portrayed him as a murderer. Others portrayed him as a symbol.
Polls found younger Americans viewed Mangione significantly more favourably than older generations, while large majorities simultaneously condemned the killing and blamed the healthcare industry for the anger behind it.
The Healthcare System Behind The Fury
What made Mangione’s case even more unsettling is this: he was never a UnitedHealthcare customer. Not once. He targeted the company because it was the largest health insurer in America by market cap, an institution he viewed as representing the entire industry’s failures.
Millions of insurance claims are denied in the United States every year. Studies found insured Americans routinely delayed medical care because of denied approvals, unexpected bills, or prior authorisation systems that interfere with treatment. UnitedHealthcare faced scrutiny specifically over its use of a predictive AI tool called nH Predict, which determined how many days of nursing care elderly patients would receive, not based on their actual clinical condition, but on historical data from similar patients. A US Senate Subcommittee documented the practice in October 2024.
After Thompson’s death and mounting public pressure, UnitedHealthcare announced it would begin approving more claims. Its own shareholders then sued to stop it, arguing the change would reduce profits.
The US health insurance industry generates over $1 trillion annually. Medical debt remains the leading cause of personal bankruptcy in America. The system Mangione allegedly targeted did not fix itself. It hired lawyers.
America’s Most Divisive Trial Approaches
Luigi Mangione now faces second-degree murder charges in New York alongside federal stalking-related charges that could still carry life imprisonment.
His trial is expected to become one of the most watched courtroom spectacles in modern America.
Because by the time the jury hears the notebook entries, the country will already be arguing over a deeper question:
Was Luigi Mangione simply a killer?
Or was he the product of a society that broke long before the gun was fired?
By Shizza Farooqui
SOURCES
Associated Press | CNN | Rolling Stone | KFF | US Senate Permanent Subcommittee on Investigations
