ADL's Oren Segal and Chapman University's Peter Simi have seen white supremacist groups mobilizing more effectively for years, and Charlottesville was a natural outgrowth of that, they say.

With hate crimes on the rise, this newest installment of “Uncovered” explores some of the nation’s most brutal cases.

The term "lone wolf" is problematic, Peter Simi says, because it was originated by neo-Nazis, and can be used to downplay violent extremist acts as isolated incidents. Worse, it can romanticize them.

ADL's Oren Segal says hate crimes are designed to strike fear into the broader community, not just the individual attacked. And with social media, extremists can "pile on" after the fact, too.

Laura Coates compares the anonymity of the Internet and social media to the Klan's hoods. If that's the case, law enforcement should use its tools to "lift the hood," she says.

Russell Henderson says he thinks about Matthew Shepard “every single day” of his life.

Former prosecutor, and 'Killed By Hate' host Laura Coates says extremist groups will incite people to commit crimes on social media while hiding behind the First Amendment's right to free speech.

Jeremy Christian fatally stabbed two men and injured another when they interceded between him and two young black women he was verbally assaulting.

Oxygen's two-hour special airs Sunday, October 20th at 7/6c.