"This was a very strong threat to our nation," Boyle said on Thursday. "There is compelling evidence about [Vallejo’s] potential for danger."
Vallejo, 63, is being charged alongside 11 other Oath Keepers members with seditious conspiracy and other crimes for their alleged role in the January 6 breach of the US Capitol complex.
The indictment against them alleges that the Oath Keepers are a loosely organized collection of individuals, some of whom with militia associations, that focuses on recruiting current and former military, law enforcement and first-responder personnel.
Vallejo and the other charged members, including group leader Stewart Rhodes, are alleged to have conspired through a variety of manners and means - including organizing into teams that were prepared and willing to use force - to prevent the certification of the 2020 presidential election results on January 6.
The seditious conspiracy charges carry a statutory maximum penalty of 20 years in prison should the defendants be found guilty of the alleged crimes.