
Dylann Roof was convicted for perpetrating the deadly 2015 attack on the predominately black Emanuel African Methodist Episcopal Church. Federal prosecutors said Roof was "self-radicalized" in that he sought out white supremacist content online on his own volition.
The Las Vegas Joint Terrorism Task Force arrested a 23-year-old man Aug. 8 who was allegedly plotting to attack Jewish houses of worship and bars frequented by the LGBTQ community in the city. In 2017, he began to frequent websites peddling a narrative that people who shared his extremist views were under attack. And as he began to relate to that narrative, he started frequenting online forums and social media groups that peddled even more radical messages that contained urgent and overt calls for violence. This eventually mobilized him to gather bombmaking materials and firearms, as well as establish contact with like-minded individuals to discuss potential targets and attack tactics. But little did he know that the co-conspirators he thought were his allies were actually undercover FBI agents who had been monitoring his online activity.