Court records show that one of the teenagers who killed three people at the Islamic Center of San Diego had been flagged to police a year earlier for idolizing Nazis and mass shooters. Authorities say the teen, identified as Caleb Vazquez, prompted a welfare check that led his parents to lock away their gun collection and for police to temporarily seize the family’s firearms. The records add to investigators' understanding of the suspects' backgrounds as they probe motive, online contacts and writings linked to the mosque attack.
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