Federal agents responsible for investigating domestic terrorism have arrested a Washington man they claim to be affiliated with the right-wing “patriot” movement for possessing an assault-style rifle with an illegal short barrel, according to court documents....

According to a complaint filed in U.S. District Court in Seattle, the FBI Joint Terrorism Task Force was alerted by a “confidential” source to “potential threats to law enforcement” made by Barbeau.

The source told agents that Barbeau — who claims on his Facebook page to be an ex-U.S. Marine — spoke frequently about how “the federal government was not abiding by the principles set forth in the Constitution and that many public servants, such as judges and police officers who had sworn to uphold it, had deviated from their oath of office,” according to court documents....

Barbeau, on his Facebook page, claims he was a member of the security detail for the family of renegade right-wing rancher Cliven Bundy during a standoff with federal agents at Bundy’s ranch in Nevada over grazing fees.