Jan. 6, 2021 Capitol
© P Photo/John Minchillo, File
Violent protesters, loyal to President Donald Trump, storm the Capitol on Jan. 6, 2021, in Washington in this file photo. The father of an inmate being held on charges from the Jan. 6, 2021, Capitol riot said his son can't get a fair trial in the District of Columbia and wants his case heard in Pennsylvania or New York.
An Alabama man affiliated with the far-right Oath Keepers militia group pleaded guilty Wednesday to seditious conspiracy for his actions leading up and through the Jan. 6 riot, marking the first person involved in the violent attack on the U.S. Capitol to be convicted of the rarely used charge.

The sentencing guideline range for Joshua A. James, who also pleaded guilty to a charge of obstruction of an official proceeding, was estimated to be 7 to nine years in prison.

The 34-year-old from Arab, Alabama, acknowledged getting into a physical altercation with a police officer while inside the Capitol and participating in a plan to use force to hinder or delay the transfer of presidential power. James also agreed to cooperate with authorities investigating the riot, including testifying before a grand jury.

Authorities say James and others affiliated with the group rode golf carts to the Capitol, moved through the crowd in a military-style "stack" formation and went into the building.

James was accused of pushing past officers who tried to stop rioters from moving toward the Rotunda, joining others who confronted officers and profanely proclaiming the building was his. A week before the riot, James said in an encrypted chat that he believed teams within the militia group were adequately armed, prosecutors said in court records.

While four other people connected with the Oath Keepers have pleaded guilty to obstruction of Congress and a lesser conspiracy charge, James is the first among the 11 people associated with the group to plead guilty to a seditious conspiracy charge.

The seditious conspiracy prosecution is the boldest publicly known attempt so far by the government to prosecute those who attacked the U.S. Capitol. The group's founder, Stewart Rhodes, and others have pleaded not guilty to seditious conspiracy and other charges. A seditious conspiracy conviction carries a maximum penalty of 20 years, compared with five years on the lesser conspiracy charge facing other group members.

Those charged with seditious conspiracy are accused of working together to use force to stop the peaceful transfer of presidential power. Authorities say participants discussed their plans in encrypted chats, traveled to the nation's capital from across the country, organized into teams, used military tactics, stashed weapons in case they felt they were needed and communicated with each other during the riot on Jan. 6, 2021.

Prosecutors say the group set up a "quick reaction force," or QRF, that kept guns at a hotel in nearby Arlington, Virginia, and were prepared to bring the weapons into Washington if Rhodes or associates believed the need arose. Days before the attack, one defendant suggested getting a boat to ferry weapons across the Potomac River. In the end, the QRF teams didn't bring guns into Washington.

At the Capitol, Oath Keepers marched in two teams in stack formation, with team members advancing forward with one hand on the shoulder of the person in front of them.

More than 750 people have been charged with federal crimes related to the riot. Over 220 riot defendants have pleaded guilty, more than 100 have been sentenced and at least 90 others have trial dates.

The attack resulted in the deaths of five people, including a police officer. More than 100 officers were injured. Rioters caused over $1 million in damage. -- Billeaud reported from Phoenix.