Kathmandu— Just days before the mass shooting at a San Diego mosque, federal law enforcement officials warned the parents of Caleb Vazquez that their son was making concerning comments about school shootings on the dark web. The parents allege that Park Mental Health Treatment of San Diego failed to intervene despite signs that their 18-year-old son posed an imminent threat to himself and others.

FBI Warning and Facility Response

On the evening of May 14, the FBI contacted Vazquez’s mother, who immediately left a message with the treatment facility to notify its staff. She shared the FBI’s warnings with her son’s therapist on May 15 and with a program director later that night. On May 18, the morning of the shooting, employees at the facility contacted Vazquez’s mother to inform her that he was missing. Video surveillance footage showed Vazquez leaving the property the night before. Park Mental Health offers a range of treatment options, some of which advertise 24-hour surveillance, while others provide more limited counseling. The center did not immediately respond to an emailed request for comment, and in a previous statement to radio station KPBS, Park Mental Health disputed the assertions in the lawsuit.

Previous Incidents and Radicalization

Vazquez had a history of concerning behavior. In January 2026, he was hospitalized for roughly three days after telling a classmate that he wanted to carry out a school shooting. Almost exactly a year earlier, he was flagged to law enforcement for exhibiting alarming behavior and idolizing Nazis, leading to 26 guns being confiscated from his father under a 2014 California law. Authorities have said Vazquez met the other shooter, Cain Clark, 17, online and that both were radicalized there. Police have not shared more details about how they knew each other or specified whose weapons were used in the shooting.

(With inputs from AP)

Originally published on abcnews.com.np.