The white nationalist Coast Guard lieutenant pleaded guilty to federal charges last year amid a plot to “murder innocent civilians” on a wide scale, the feds said.
The GOP state representative helped plot Ammon Bundy's 2016 takeover of a rural wildlife refuge.
The attorney general said the FBI will host a training session as officials work to “identify, assess and engage potential mass shooters before they strike."
Michelle Louise Kolts also had dozens of books and DVDs about murder, mass killing, domestic terrorism and bomb-making.
The white nationalist Coast Guard lieutenant plotted to “murder innocent civilians on a scale rarely seen in this country," the feds said.
The prosecution of Christopher Paul Hasson shows some of the challenges the FBI faces in prosecuting armed extremists allegedly plotting violence.
The agency says the internet has become a breeding ground for domestic terrorism, following hate-based mass shootings in the U.S.
Jeffrey Clark pleaded guilty to a gun charge in July and served nearly 10 months in custody.
The city's board of supervisors is urging other cities and states, as well as the federal government, to follow suit.
Rep. Adam Schiff (D-Calif.) introduced legislation that would make it possible to prosecute white supremacist attacks, such as the shooting in El Paso, as acts of terrorism.