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The suspect in the fatal shooting of UnitedHealthcare CEO Brian Thompson may have used a so-called "ghost gun" he made from a 3D printer, NYPD Chief of Detectives Joseph Kenny
said. On Monday, Dec. 9, the NYPD announced that they identified Luigi Mangione, 26, as the suspect in the fatal shooting of Thompson, who was fatally shot in Manhattan last week, NYPD
Commissioner Jessica Tisch confirmed at a press conference. Mangione was detained on Monday at an Altoona, Pa., McDonalds after an employee notified police, police said. He was discovered in
possession of a firearm similar to that used to shoot Thompson, a fake N.J. ID used to check into a hostel where the shooter allegedly stayed, and a manifesto critical of the health
insurance industry, police say. Kenny said the ghost gun — an untraceable firearm, often assembled from kits or 3D-printed — "may have been made on a 3D printer." The gun was
"capable of firing a 9 mm round," Kenny said. Confirmation of that "will come out in testing." An X account belonging to a Luigi Mangione describes him as a Honolulu,
Hawaii, resident with a bachelor's and master's degree in computer science from the University of Pennsylvania. Thompson was fatally shot outside the New York Hilton Midtown hotel,
where the CEO was attending a company investors' conference. The hooded, masked suspect fled the scene on a bike, with police losing track of him in Central Park. Police believe the
suspect deliberately targeted Thompson, "lying in wait" outside the hotel as other pedestrians walked by and only opening fire when Thompson arrived.