Parents of San Diego mosque gunman say a mental health facility failed to heed FBI warning
Family of San Diego Mosque Shooter Sues Mental Health Center, Alleging Ignored FBI Warning
Qwenews.com – A civil lawsuit filed in a San Diego court on August 31 has placed a federal warning call at the center of a growing legal reckoning over the May 18 mass shooting at a mosque in the city. The suit, brought by the mother of one of the two teenage gunmen, contends that the treatment facility where her son was a resident failed to act on explicit signs of danger — including a direct notification from the FBI — days before the attack that killed three worshippers and ended in the shooters' own deaths.
The Warning Timeline
According to court documents, federal agents telephoned the mother of Caleb Vazquez on the evening of May 14 to relay that her son had been posting unsettling remarks about school shootings on dark-web platforms. The mother states she immediately called the facility where Vazquez was being treated and left a message alerting staff to the FBI's concern. The following day, May 15, she repeated the warning to her son's therapist and, later that evening, to a program director at the same center.
Three days later, on the morning of May 18, staff at the facility phoned the mother to inform her that Vazquez could not be found. Surveillance video later revealed that he had walked off the property at approximately 8 p.m. the night before. His parents spent the morning of the shooting driving through the neighborhood searching for him before learning of the massacre at the mosque.
Facility Response and Dispute
The lawsuit names Park Mental Health Treatment of San Diego as the defendant, alleging that the center neglected to intervene despite indicators that its 18-year-old resident posed an imminent danger to himself and to the public. Vazquez had been admitted to the facility for treatment of depression and psychotic episodes, among other conditions.
The center did not respond to a written request for comment sent Saturday afternoon. Earlier, however, it issued a statement to radio station KPBS in which it rejected the family's claims:
"While it is understandable that his parents might seek to blame someone in their time of loss, this lawsuit is misguided in that neither Park nor its employees are responsible for Mr. Vazquez's actions."
"Only he and his coconspirator bear responsibility for their conduct and, ultimately, his death."
An FBI spokesperson likewise declined to comment on Saturday, citing agency policy on public statements.
A Pattern of Escalating Concern
The May 14 phone call was not the first time authorities had flagged Vazquez's mental state. In January 2026, he was hospitalized for roughly three days after telling a classmate that he intended to carry out a school shooting. Nearly a year before that episode, police were alerted to his alarming behavior and his idolization of Nazi figures. Under a 2014 California statute permitting law enforcement to seize firearms from individuals deemed dangerous, officers confiscated 26 guns from his father.
Authorities have stated that Vazquez met the second shooter, 17-year-old Cain Clark, through an online platform and that both teenagers were radicalized in that digital environment. Police have not disclosed further specifics about how the two coordinated or identified which weapons were used at the mosque.
The Shooting and Its Aftermath
On May 18, Vazquez and Clark entered the San Diego mosque and killed three people before turning their weapons on themselves. A separate 17-year-old was charged with murder on allegations that he had agreed to publish the shooters' writings, effectively serving as a co-conspirator in the planning stage. That indictment was announced by North Carolina authorities on the same day the family's lawsuit was filed in San Diego.
Broader Legal and Policy Context
The suit arrives amid a wave of high-profile criminal convictions of parents and guardians who supplied teenagers with firearms later used in mass shootings across the country. Those cases have intensified scrutiny of how mental health systems, schools, and families share information about at-risk adolescents — and whether existing protocols are adequate when a federal agency issues a direct warning to a parent.
Park Mental Health advertises a spectrum of services, ranging from intensive programs with around-the-clock surveillance to more limited outpatient counseling. The lawsuit does not specify which tier of care Vazquez occupied at the time of his departure, nor does it clarify whether his leaving the premises at 8 p.m. was authorized or constituted a rule violation. Those questions are likely to become central issues as the case proceeds through the San Diego court system.
For the families of the three worshippers killed at the mosque, and for a community still processing the trauma of May 18, the filing underscores a painful question: when a government agency identifies a specific individual as a potential threat and notifies his parents, what obligations attach to the institution where that individual is in daily care? The answer, whatever the court ultimately determines, will shape how mental health facilities across California handle future federal alerts.
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