As a leader of the Patriot Movement, the Republican representative, "planned, engaged in, and promoted a total of three armed conflicts of political violence against the United States government."
"We have uncovered evidence ... that the shooter was exploring violent ideologies," the FBI said. A list of organizations found on the gunman's digital media may have indicated potential targets.
NPR's David Greene speaks with former National Security Council senior director Javed Ali, who's among those calling on the government to make fighting homegrown terrorists a priority.
Lawmakers on Capitol Hill are pushing the federal government to detail its plans to fight white supremacy and other far-right extremism. Details are scarce, but here's what we know so far.
Christopher Paul Hasson, a self-proclaimed white nationalist, allegedly wanted to "kill every last person on earth" in a crusade to establish a "white homeland," according to officials.
Potentially deadly letters and packages are rare, and technology makes it easier to track down perpetrators. But they can play a powerful role in further polarizing the country, analysts say.
Michael Hari has made a stunning array of headlines over the years. An alleged co-conspirator said they wanted to scare Muslims "out of the country." No one was injured.
More than a week after the Las Vegas massacre, investigators are still without a motive. "What survivors really need sometimes is to get closure," one psychologist says.
The Las Vegas shooting has again raised questions about domestic terrorism. The Patriot Act provides a definition, but because there are no actual criminal charges, some prefer not to use the term.