Luigi Mangione identified by San Francisco police days before arrest for CEO Brian Thompson’s murder

San Francisco police linked Luigi Mangione to CEO Brian Thompson’s murder days before his Pennsylvania arrest.

Police in San Francisco reportedly identified Luigi Mangione as the alleged killer of UnitedHealthcare CEO Brian Thompson days before his arrest in Pennsylvania.

A member of the Special Victims Unit was reviewing surveillance images released by the New York Police Department on December 5, just one day after the shooting, and recognized the suspect as Mangione, according to sources cited by the *San Francisco Chronicle*.

The officer had been investigating Mangione’s disappearance after his mother, Kathleen, reported him missing in mid-November.

She stated she had not heard from her son since July 1 and mentioned his employment with San Francisco-based TrueCar, an online automotive marketplace—apparently unaware he had been laid off earlier in 2023.

Upon identifying the suspect, the officer reportedly contacted the FBI and provided Mangione’s name, though law enforcement officials later claimed the 26-year-old was not under their scrutiny until his arrest in Pennsylvania on Monday.

Mangione was detained on firearm charges that day after stopping at a McDonald’s in Altoona, where a customer recognized him.

At the time of his arrest, Mangione was reportedly carrying a 3D-printed pistol with a black silencer and a Glock magazine containing six 9mm full-metal jacket rounds, which the NYPD stated matched the ammunition found at the scene of Thompson’s murder.

Authorities also recovered a manifesto from Mangione, in which he detailed grievances against UnitedHealthcare following a debilitating back injury that required painful spinal surgery.

"To save you a lengthy investigation, I state plainly that I wasn't working with anyone. This was fairly trivial: some elementary social engineering, basic CAD, [and] a lot of patience," he allegedly wrote in the manifesto, according to the *Daily Beast.*

He expressed "respect" for federal investigators and apologized for causing any "traumas," though he appeared to justify his alleged actions.

"Frankly these parasites had it coming," the manifesto wrote.

It further criticized the American healthcare system, describing it as the "most expensive healthcare system in the world," yet highlighting its rank as only 42nd in life expectancy.

Police have stated they have "no indication" that Mangione was ever a client of UnitedHealthcare.