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In a tragic incident at a San Diego mosque this week, one of the teenagers involved in the fatal attack had previously caught the attention of law enforcement. Last year, concerns were raised about Caleb Vazquez, who exhibited disturbing behaviors and expressed admiration for Nazi ideologies. This led to a significant police intervention, as court records reveal.
During a welfare check at the Vazquez residence, officers noted Caleb’s suspicious activities, including his fixation on Nazis and mass shooters. Consequently, on January 29, 2025, they obtained a court order to remove 26 firearms from the home. This action was in line with a 2014 California law that permits the confiscation of weapons from individuals deemed a threat.
Initially, Caleb’s father, Marco Vazquez, resisted police requests to inspect the storage of his firearms. However, it was later confirmed through an affidavit signed by Marco that the family had already moved the guns to a secure storage facility several days before the police’s arrival.
Authorities have disclosed that Caleb, 18, and his accomplice, Cain Clark, 17, connected online and underwent a process of radicalization together. Despite this information, law enforcement has not provided further details about the nature of their relationship or specified which weapons were involved in the shooting. The investigation continues as the community grapples with the aftermath of this senseless act of violence.
Authorities have said Vazquez, 18, met Cain Clark, 17, online, where they both were radicalized. Police haven’t shared more details about how they knew each other, or specified whose weapons were used in the shooting.
Cain Clark’s mother told law enforcement that weapons were missing from her home on Monday, kicking off an hourslong search for the teens before they committed the shooting at the Islamic Center of San Diego and then killed themselves, police said.
Court filings indicate mental health struggles
Court filings show Vazquez decided to “secure all sharp knives in the home” and removed from the house the firearms that they had previously kept in a secure gun safe into an outside storage facility. The affidavit also mentions unspecified serious allegations against their son, who was also previously committed to an involuntary psychiatric hospitalization. The court filings, first reported by The New York Times, didn’t say what he was admitted for.
The Vazquez family said in a statement released Thursday that Caleb Vazquez was on the autism spectrum and had grown to resent parts of his identity — but didn’t specify what aspects were challenging to him.
“Coming from a diverse family that not only includes immigrants but Muslims as well, we always taught the importance of acceptance, compassion, and love for one another. We are proud of the different backgrounds, cultures, ethnicities, and religions within our family and community,” their statement said.
“We believe this, combined with exposure to hateful rhetoric, extremist content, and propaganda spread across parts of the internet, social media, and other online platforms, contributed to his descent into radicalized ideologies and violent beliefs,” said their statement, released through their attorney Colin Rudolph.
His family said they tried to get him help
In writings by Vazquez and Clark that expressed white supremacist views, Vazquez wrote of having “some mental health issues” and being rejected by women. They suggest both teenagers idolized previous shooters who have died while carrying out mass shootings. The writings expressed hatred toward Jewish people, Muslims, Black people and a range of other groups.
Clark was enrolled in a virtual high school in the district, Canning said.
Police began searching for the teens on Monday after Clark’s mother called to say her son was suicidal and ran away. She told them he was dressed in camouflage, had taken multiple weapons from the home, and was with an acquaintance, San Diego Police Chief Scott Wahl said earlier this week.
Officers were still interviewing the mother about places the teens might be when the shooting began at the county’s largest mosque.
De-radicalizing people is becoming more difficult
Vazquez’s father said in a 2025 court statement that his family made a concerted effort to steer Caleb Vazquez back onto the right track. He said when they locked away their weapons, they were in communication with his school, were monitoring his social media presence closely and he was in therapy twice a week.
“We observe all of his online activities, who he talks to, what he talks about, and who he is friends with,” Marco Vazquez wrote, emphasizing that he didn’t support his son’s ideology.
Some experts say it’s increasingly difficult to help people drawn to the kind of radicalism Vazquez and Clark expressed.
Samira Benz works for the Violence Prevention Network, which conducts interventions when people are radicalized into believing in violent extremism. Benz said the work has become increasingly complicated as the internet blurs ideologies and creates niche, meme-based languages that can be fleeting and hard to decipher.
“Even if a parent is looking at the phone of their child, they don’t necessarily see something bad is going on,” Benz said.
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