Teens suspected in deadly shooting at Islamic Center of San Diego could be tied to dangerous online extremist groups

CHICAGO (WLS) — Over recent months, the ABC7 I-Team has delved into the unsettling world of online groups that spread chaos internationally. According to sources close to ABC News, the suspects in the now-closed San Diego Islamic Center shooting case might have ties to similar destructive extremist circles on the internet. A former expert from the Department of Homeland Security believes these connections should have sparked prompt intervention.

“In many of these situations, these individuals were already on the radar, indicating that their actions had drawn attention and were often reported,” explained John Cohen, who previously served as the Assistant Secretary for Counterterrorism at the Department of Homeland Security.

ABC7 Chicago is now streaming 24/7. Click here to watch

Cohen shared with the I-Team that when reports emerge about someone showing interest in mass violence, it is crucial for law enforcement to step in—not always with an arrest, but through various forms of intervention.

“Taking action doesn’t always mean making an arrest,” Cohen stated. “It could involve engaging with the individual’s family, collaborating with mental health experts, and working within the community to mitigate the threat and prevent a potential mass casualty event.”

Insiders reveal that last year, police in Chula Vista had a run-in with one of the suspects, Caleb Vazquez, who was a minor at the time. This contact followed a tip-off from someone close to him who feared his interest in extremist ideologies and mass violence.

Upon reviewing Vazquez’s social media, an officer allegedly discovered content promoting neo-Nazi rhetoric.

But sources say the concerns did not rise to the level of an arrest and it is unclear whether there was any follow-up.

“The law enforcement organization that receives that information needs to not just determine whether there is an arrestable offense that’s taken place, but they need to conduct a threat assessment,” said Cohen.

The I-Team recently traveled to US Secret Service headquarters in Washington, D.C., profiling the work of the National Threat Assessment Center whose research is designed to prevent targeted violence like the shooting in San Diego. NTAC trains law enforcement agencies, schools and communities across the country, including in the Chicago area, to identify troubling behaviors and intervene before it’s too late.

“These concerning behaviors that are exhibited by these attackers and plotters have been very consistent,” said Katie Lord, Supervisory Domestic Security Strategist, NTAC.

Troubling signs like those exhibited by the suspected shooters, interest in mass shootings, neo-Naziism and more should have triggered early intervention, said Cohen. “Law enforcement can no longer afford just to take action solely upon a determination that a crime has been committed in today’s threat environment.”

The I-Team reached out to the Chula Vista police department. We did not hear back but a spokesperson told ABC News Tuesday in part that the department “extends its deepest condolences to all those affected by this tragedy.”

Investigators say they’ve now seized more than 30 firearms from two homes connected to the teen attackers.

Copyright © 2026 WLS-TV. All Rights Reserved.

Leave a Reply

Your email address will not be published. Required fields are marked *

You May Also Like
South Carolina personal trainer goes missing, last spotted walking toward wooded area

South Carolina Personal Trainer Reported Missing After Last Seen Heading Toward Wooded Area

A South Carolina woman has been missing since last week after she…
Daredevil who performed at Super Bowl with Madonna killed in Utah canyon BASE jump

Super Bowl Stunt Legend Who Performed With Madonna Dies in Tragic Utah Canyon BASE Jump

Andy Lewis, the daredevil athlete who thrilled millions during Madonna’s 2012 Super…
California Gov. Gavin Newsom says Justice Department is investigating him and his wife

Newsom Says Justice Department Is Investigating Him and California First Partner Jennifer Siebel Newsom

Washington — California Gov. Gavin Newsom said Monday that he and his…
Russia linked to arson attacks on properties connected to UK PM Keir Starmer, police say

Police Probe Russia Link in Arson Attacks on Properties Tied to UK PM Keir Starmer

British authorities on Monday disclosed fresh details about a string of arson…
American hiker vanishes on tropical trek as flash floods, mudslides turn jungle getaway into desperate search

American Hiker Missing After Flash Floods and Mudslides Hit Tropical Jungle Trek

SEE IT: Hawaii swamped by flash flooding More than 5,500 residents on…
There's an actual farmhouse in Manhattan. It's a portal to the 1700s.

Manhattan’s Hidden 1700s Farmhouse Offers a Rare Glimpse Into New York’s Colonial Past

INWOOD, Manhattan — Nestled among apartment houses, corner stores, and the bustle…
Vance: Iran Will Destroy Nuclear Dust, Will Get 'Benefits' if They End Enrichment, Allow Strong Inspections

Vance Says Iran Can Keep Peaceful Nuclear Program—But Must End Enrichment and Accept Tough Inspections

Vice President JD Vance said Monday that any agreement with Iran would…
Live explosive device found near Homeland Security office in Cleveland, forcing mass evacuations

Live explosive device discovered near Homeland Security office in Cleveland, prompting mass evacuations

Authorities evacuated a Homeland Security office near Cleveland on Monday after a…
Jiffy Lube oil change issues: Chicago area drivers say bad oil changes caused thousands of dollars in damage

Chicago Drivers Blame Jiffy Lube Oil Changes for Costly Engine Damage

CHICAGO (WLS) — The I-Team continues to hear from drivers facing repair…
'Resilient' art piece by Damon Lamar Reed installed in spot where burning cross was found in Grant Park, Chicago

Chicago Unveils Damon Lamar Reed’s “Resilient” in Grant Park at Site of Burned Cross

CHICAGO (WLS) — A public artwork titled “Resilient” returned to Grant Park…
Savannah Guthrie reveals new details in mom’s disappearance that don’t add up as questions haunt case: expert

Nancy Guthrie Mystery Reveals Emerging Threat Catching Unsuspecting Americans Off Guard

A possible “wrench attack” motive is drawing increased attention in the Feb.…
Chicago shootings this weekend: At least 10 shot, 2 fatally, in gun violence across city, police department says

Chicago Police Officer Shoots One Person in Uptown; Another Civilian Injured on West Argyle Street

Two people were seriously injured Monday evening in Chicago’s Uptown neighborhood, including…