The firearm discovered on Luigi Mangione, the 26-year-old suspect in the recent fatal shooting of UnitedHealthcare CEO Brian Thompson, has been confirmed to match the shell casings found at the crime scene, according to police officials on Wednesday. This confirmation follows reports of a positive match between Mangione’s fingerprints and those found at the scene.
Mangione was charged on Monday night with second-degree murder, three weapons possession-related charges, and one forgery charge in Manhattan state court, as per court records. These charges are in addition to those in Pennsylvania following his arrest earlier that day.
New York Police Commissioner Jessica Tisch announced at a press conference on Wednesday that the gun found on Mangione matches the shell casings from the scene of Thompson’s death. The gun is suspected to be 3D-printed. Tisch also stated that lab results confirmed Mangione’s fingerprints on a water bottle and protein bar wrapper found near the crime scene, corroborating earlier reports of a positive match.
Upon his arrest in Altoona, Pennsylvania, on Monday, police discovered Mangione in possession of a handwritten “manifesto” and a notebook outlining plans for the shooting. The New York Times reported that the manifesto detailed a plan to “wack the CEO at the annual parasitic bean-counter convention” in a “targeted, precise” attack that “doesn’t risk innocents.” CNN also reported on the notebook, which included a to-do list and rationale for his alleged plans, citing an unnamed police source.
Mangione had a court hearing in Pennsylvania on Tuesday, where he was denied bail for the second time and indicated he would contest his extradition to New York. This process could reportedly take weeks.
During his extradition hearing, Mangione was heard shouting: “It’s completely out of touch and an insult to the intelligence of the American people and their lived experience!”
An arrest warrant filed in New York and unsealed on Tuesday alleges that Mangione presented the same false identification to Pennsylvania officers that he had given to a hostel in New York City. He was also found with “written admissions about the crime,” though no further details were provided in the filing, which was obtained by the Washington Post and other outlets.
The New York Times and CNN obtained an internal NYPD report that described the “manifesto” found on Mangione at the time of his arrest. The report noted that Mangione viewed the targeted killing of the company’s highest-ranking representative as a symbolic takedown and a direct challenge to its alleged corruption and “power games.” Mangione asserted in his note that he is the “first to face it with such brutal honesty.”
The NYPD document also expressed concern that others might see Mangione as “a martyr and an example to follow,” and that Mangione likely views himself as a hero, according to the Times.
A hotel clerk in Altoona told ABC News that Mangione attempted to get a room at the hotel the morning he was arrested, but was turned away due to a lack of clean rooms. The clerk described Mangione as “cagey, just looking around, making sure he wasn’t being watched.”
Mangione, originally from Maryland, was last known to be living in Honolulu and has no prior arrest history in New York or elsewhere in the country. He may have attended college in Pennsylvania, according to police.
Social media profiles that appear to belong to Mangione indicate that he graduated from the University of Pennsylvania with bachelor’s and master’s degrees in computer and information science in 2020, after attending the Gilman School for high school. A LinkedIn page believed to be Mangione’s lists internships at the Johns Hopkins Laboratory for Computational Sensing and Robotics and Firaxis Games, followed by employment as an engineer at TrueCar, a car shopping website based in California, where he worked for four years. The Times also reported that Mangione worked as a counselor in the Stanford Pre-Collegiate Studies Program in 2019.