A Florida man who went into the U.S. Capitol on Jan. 6 as part of a group of Oath Keepers pleaded guilty on Wednesday in a large criminal conspiracy involving more than a dozen other defendants charged in connection with the Capitol attack.

Graydon Young is the first Oath Keeper charged in the large conspiracy to enter a public guilty plea. Judge Amit P. Mehta accepted Youngs guilty plea at a hearing in D.C. federal court, within eyesight of the U.S. Capitol.