Prosecutors probing the Jan. 6 riot at the U.S. Capitol are building complex conspiracy cases that take aim at far-right activists, zeroing in on the motives and ideologies of the extremist groups that participated in the siege.
After arresting more than 150 Donald Trump rioters for relatively minor offenses like trespassing and disorderly conduct, law-enforcement officials said on Tuesday they are poised to file more serious charges under the rarely used federal sedition statute. That would raise the stakes of the investigation for both prosecutors and accused rioters: The law doesn't lend itself to easy convictions, but it carries a prison sentence of as long as 20 years.
In the initial scramble to arrest the most visible perpetrators of the siege, U.S. prosecutors built cases largely using photos and videos culled from social media. Now they are relying on more traditional law-enforcement tools, including over 500 grand-jury subpoenas and search warrants, to probe the origins of the insurrection and the motives of the rioters.
The sedition statute criminalizes any attempt by two or more people to overthrow the government, take control of its property or disrupt the execution of U.S. laws. Members of right-wing groups such as the Proud Boys and the Oath Keepers would be the likely targets of a sedition charge, which could force courts to reckon with the role of extremist militias in American society.
Prosecutors "will put those ideologies on trial," said Alan Rozenshtein, a former legal adviser in the Justice Department's national security division who now teaches at the University of Minnesota's law school. "If there's a conviction, the message will be that to be a boogaloo boy or an Oath Keeper is to believe in seditious conspiracy."
Much will depend on which part of the statute the prosecutors focus on. Under a broad interpretation of the law, two people who worked together to steal a podium or some other piece of government property from the Capitol could be charged with sedition.
But prosecutors may actually be planning to charge rioters under the part of the statute that criminalizes attempts to overthrow the government, which would mark a turning point in the probe as lawmakers and civil rights advocates debate how best to hold domestic extremists accountable for their crimes.
"The statute suggests that proving seditious conspiracy can either require a lot or not a lot depending on which part of the statute prosecutors charge," said David Sklansky, the faculty co-director of the Stanford Criminal Justice Center. "Charging people with conspiring to overthrow the government is taking on a big burden."