As part of his guilty plea, Schaffer will be cooperating with the government from now on, which should give them even more information on the planning behind the attack on the U.S. Capitol. Schaffer is also a guitarist for the heavy metal band, Iced Earth. A band more or less defunct since his arrest. Source; NBC News An Indiana man accused of being a longtime member of the Oath Keepers pleaded guilty Friday to illegally entering the U.S.