FILE - Thomas Caldwell of Berryville, Va., a defendant charged with seditious conspiracy in one of the most serious cases to emerge from the Jan. 6, 2021 attack on the U.S. Capitol, arrives at the federal courthouse, Sept. 28, 2022, in Washington. Federal prosecutors are preparing to lay out their case against the founder of the Oath Keepers’ extremist group and four associates. They are charged in the most serious case to reach trial yet in the Jan. 6, 2021, U.S. Capitol attack. Opening statements are expected Monday. (AP Photo/Manuel Balce Ceneta, File)