A Minnesota man is accused of walking into a Brooklyn federal jail Wednesday night claiming to be an FBI agent with a judge’s order to spring Luigi Mangione — the alleged assassin of UnitedHealthcare CEO Brian Thompson. Authorities at the Metropolitan Detention Center arrested Anderson after his bizarre impersonation attempt at 6:50 p.m., according to the federal criminal complaint. It’s unclear how Anderson, who is from Mankato, located about a 90-minute drive south of Minneapolis, traveled to Brooklyn. Mangione faces federal and state murder charges, including the rare charge of first-degree murder in furtherance of terrorism. Top: Luigi Mangione is escorted into Manhattan state court in New York last year (AP Photo/Seth Wenig), and evidence presented in the federal court complain against Minnesotan Mark Anderson.