Man arrested after 'posing as FBI agent' to break Luigi Mangione out of prisonA 36-year-old man told jail staff he had "weapons", which resembled barbecue fork pizza cutter, inside his backpack as he tried to break an inmate out of prisonView Image Mangione is accused of killing UnitedHealthcare CEO Brian Thompson in December 2024. (Image: Getty Images)A man allegedly posed as a federal agent to accused CEO killer Luigi Magione out of his Brooklyn jail holding centre. Mark Anderson, 36, allegedly posed as an FBI agent and walked into the intake section of the MDC Brooklyn jail on the night of Wednesday, January 28. It is reported that he tried to help accused UnitedHealthCare CEO killer, Luigi Mangione, out of prison. "Anderson also displayed and threw at the BOP officers numerous documents," an FBI agent who signed the complaint wrote.