Mangione is accused of gunning down UnitedHealthcare CEO Brian Thompson.June 25, 2026, 5:49 PMDefense attorneys for Luigi Mangione and federal prosecutors in Manhattan discussed a possible guilty plea ahead of a hearing next week, sources familiar with the matter told ABC News Thursday.The sources said it was not clear how close the two sides came to an agreement before the negotiations stopped. Mangione pleaded not guilty to state and federal charges after he was arrested for allegedly gunning down UnitedHealthcare CEO Brian Thompson on a Midtown Manhattan street in December 2024.Luigi Mangione appears for a pre-trial hearing at Manhattan Criminal Court in New York, June 17, 2026.Angelina Katsanis/POOL/AFP via Getty ImagesThis is a developing story. Please check back for updates.