Luigi Mangione appears for a suppression of evidence hearing in the killing of UnitedHealthcare CEO Brian Thompson in Manhattan Criminal Court, December 18, 2025 in New York City. (Curtis Means-Pool/Getty Images)(NEW YORK) — A Minnesota man allegedly tried to break Luigi Mangione out of jail in New York, law enforcement sources told ABC News. Mark Anderson, 36, was charged Thursday with impersonating a federal agent after authorities said he showed up at the Metropolitan Detention Center in Brooklyn claiming to be an FBI agent with a court order to release Mangione, sources said. Mangione is being held at MDC-Brooklyn while he awaits federal and state trials for the assassination-style killing of UnitedHealthcare CEO Brian Thompson in December 2024. The complaint does not name Mangione, but law enforcement sources told ABC News that is who Anderson was seeking.