Now, federal authorities say the man, identified as Air Force Staff Sgt. Steven Carrillo, 32, was an adherent of the "boogaloo boys," a growing online extremist movement that has sought to use peaceful protests against police brutality to spread fringe views and ignite a race war. Federal investigators allege that's exactly what Carrillo was trying to do last month.
Federal prosecutors on Tuesday charged Carrillo with murder and attempted murder, and leveled aiding and abetting charges against Robert Alvin Justus Jr., who has admitted to serving as a getaway driver during the courthouse ambush,
according to the FBI. Protective Security Officer David Patrick Underwood was killed and a second officer, whom officials have not named, was critically wounded in the ambush. Inside the three vehicles Carrillo used, police found a boogaloo patch, ammunition, firearms, bombmaking equipment and three messages scrawled in blood: "
I became unreasonable," "Boog" and "Stop the duopoly."
