An Oath Keeper accused of conspiring with other members of the paramilitary group for months to storm the U.S. Capitol on Jan. 6 has agreed to cooperate with the feds and testify against his co-conspirators at trial. Graydon Young, a 54-year-old Florida resident, pleaded guilty on Wednesday to charges of conspiracy and obstruction of an official proceeding. As part of his plea agreement, Young has “agreed to provide testimony before grand jury and trial,” participate in interviews with law enforcement and waive his right to counsel. He also agreed to pay $2,000 in restitution.

During a Wednesday hearing, U.S. District Judge Amir Mehta noted that Young now faces a maximum sentence of 78 months in prison for his offending, though he noted that a sentence could be reduced once prosecutors analyze the usefulness of his cooperation. The feds alleged Young was among a group of 16 who conspired together to attack the Capitol. He is the second member of the Oath Keepers to plead guilty for their role in the siege but the first member charged with conspiracy to cop to their crimes.