When a Florida man who had recently converted to Islam fatally shot two of his roommates, the name came up.

When the roommate he did not shoot was sentenced to five years for homemade explosives, the name came up.

And when an arrest was made after a 19-year-old college student was found dead with more than 20 stab wounds, the name came up.

That name was the Atomwaffen Division, a tiny paramilitary neo-Nazi group that has been linked to the suspects in at least five killings in the United States. It is among the most violent groups on the far-right, a mostly decentralized organization about which much is still unknown…

Read more in  The New York Times.