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May 20, 2026 FBI and San Diego law enforcement had previously flagged one mosque shooter as a threat and seized his father's guns a year before the attack Tier 1 · Primary Civil Rights and Dissent
A known extremist carried out a mass shooting despite prior threat-assessment flags, revealing failures in the prevention pipeline for radicalized individuals.
Independently corroborated by5 independent news desks
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Supporting reports
- FBI flagged San Diego mosque shooter as potential threat; father's guns seized a year prior — Caleb Vazquez, 18, one of two white supremacist shooters who killed three people at the Islamic Center of San Diego on Monday, had been flagged by the FBI as a "potential threat" and was already on law enforcement radar. Local officials, alarmed by his idolization of mass shooters and Nazism, seized his father's guns in a protective order a year before the attack. Vazquez had also been placed in an involuntary psychiatric hold. Despite these interventions, he and accomplice Cain Clark, 17, carried out the mosque attack, which killed a security guard and two other men.
Verified: Tier 1 primary record
Week 70 – 2026-05-16–2026-05-22
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