# San Diego mosque shooting legal proceedings

> Live situation record from CLSTR: https://clstr.news/situations/san-diego-mosque-shooting-legal-proceedings
> Updated: 2026-09-05T23:41:08.000Z. Sources: 10. Developments: 2.

Following a fatal shooting at the Islamic Center of San Diego on May 18, the parents of Caleb Vazquez have filed a wrongful death lawsuit against Park Mental Health. The lawsuit alleges negligence and medical malpractice, claiming the facility failed to intervene despite warnings that Vazquez posed an imminent threat.

Court filings indicate that on May 14, the FBI notified Vazquez’s mother that her son had been communicating on the dark web regarding school shootings and suicide. The lawsuit alleges the mother notified both the treatment facility and her son’s therapist of these warnings on May 14 and May 15. On the morning of the attack, facility employees informed the mother that Vazquez was missing; surveillance footage reportedly showed him leaving the property at 8 p.m. the previous evening.

The May 18 incident involved Vazquez and 17-year-old Cain Clark, who killed a security guard and two community members before both teenagers died in a vehicle. Investigators determined Clark shot Vazquez in the head before committing suicide. 

Legal counsel for Park Mental Health has rejected the claims, stating the facility is not responsible for the movements of clients in voluntary treatment programs and noting that Vazquez was not under court-ordered confinement.

## Claims

- Park Mental Health Treatment of San Diego failed to intervene despite signs that Caleb Vazquez posed a threat. (corroborated by 8 sources)
- The FBI warned Vazquez's parents that he was making concerning comments about school shootings on the dark web. (corroborated by 8 sources)
- Caleb Vazquez and another teenager killed three people at a San Diego mosque before committing suicide. (corroborated by 8 sources)
- The FBI contacted Vazquez's mother on the evening of May 14 regarding his behavior. (corroborated by 8 sources)
- Surveillance footage showed Vazquez leaving the mental health facility at 8 p.m. on May 17. (corroborated by 8 sources)

## Timeline

### 2026-09-05: San Diego mosque shooting: Lawsuit alleges mental health facility ignored FBI warnings

Parents of a San Diego mosque shooter are suing a mental health facility, alleging it ignored FBI warnings about their son's concerning dark web activity prior to the fatal attack.

8 sources. https://clstr.news/cluster/san-diego-mosque-shooting-lawsuit-alleges-mental-health-facility-ignored-fbi-warnings

### 2026-09-02: San Diego mosque shooter's parents sue mental health clinic

Parents of Caleb Vazquez, involved in the San Diego mosque shooting, are suing Park Mental Health for negligence and malpractice, alleging the facility failed to properly care for him despite known risks.

2 sources. https://clstr.news/cluster/san-diego-mosque-shooters-parents-sue-mental-health-clinic

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Cite as: San Diego mosque shooting legal proceedings. CLSTR, https://clstr.news/situations/san-diego-mosque-shooting-legal-proceedings