The leader of the Southern California chapter of the extremist group "Cali Bois" lives in Murrieta, according to an FBI criminal complaint. Unbeknownst to the group, an undercover FBI agent and an informant also attended the gathering. His instruction included a PowerPoint presentation titled, "F***ing the ATF and Making the NFA Your B**ch 101. Suppressor edition," according to the complaint. Chen brought multiple firearms and silencers to the Murrieta meeting and made an illegal $400 silencer sale, the complaint alleged. Court records show a judge ordered Chen to be evaluated for "mental illness and other ailments." He was indicted by...