San Diego mosque shooter Caleb Vasquez’s horrifying final moments are now under FBI investigation after a chilling livestream surfaced online. Authorities say Vasquez repeatedly pushed a rifle toward his own head and appeared to encourage accomplice Cain Clark to shoot him after the deadly Islamic Center massacre that left three dead, including hero security guard Amin Abdullah. The attackers reportedly wore Nazi symbols, carried weapons marked with hate slogans like “Race War Now,” and left behind a disturbing manifesto praising Adolf Hitler.