Former U.S. Navy SEAL Sentenced for Transporting Explosives to Throw at Law Enforcement at California Protests

ALBUQUERQUE - A former U.S. Navy SEAL who intended to use explosives against law enforcement officers at California protests and whose actions prosecutors argued were motivated by extremist, antisemitic beliefs was sentenced to 16 months in prison.

There is no parole in the federal system.

According to court records and evidence presented at trial, on June 12, 2025, Gregory Vandenberg, 49, was traveling from El Paso, Texas, to San Diego, California, to attend the "No Kings Day" protests scheduled for June 14, 2025. While in New Mexico, Vandenberg visited a travel center off Interstate 10 near Lordsburg and purchased six large mortar fireworks, which are designed to shoot high into the air and explode, and 72 M-150 firecrackers, which are designed to sound like gunfire. During this visit, he told the store clerk that he intended to throw fireworks at police officers at the upcoming protests. He asked detailed questions about the amount of gunpowder in the fireworks, their explosive impact, and their ability to harm others. He also discussed taping multiple fireworks together to increase their explosive force. Vandenberg emphasized that he was not interested in the color or display of the fireworks, only in their ability to create explosions and injure law enforcement officers. He also encouraged the clerk to join him at the protests and discussed distributing fireworks to others at the event.

Employees, alarmed by Vandenberg's statements and his repeated expressions of intent to throw explosives at law enforcement officers, recorded his license plate and contacted law enforcement. Authorities later alleged that Vandenberg intended to use the fireworks against law enforcement personnel during the protests, conduct that prosecutors described as posing a serious risk of injury or death to officers and bystanders alike.

Federal agents tracked Vandenberg to Tucson, Arizona, and arrested him the following morning while he was sleeping in his car at Davis-Monthan Air Force Base. Vandenberg initially claimed to be traveling for work (despite being unemployed at the time) and later falsely stated he was visiting friends in Phoenix that weekend.

A search of his vehicle revealed the purchased fireworks, along with clothing displaying antisemitic, anti-Israel, and extremist imagery, including a shirt bearing the Al-Qaeda flag and another calling for the destruction of Judea. Agents also discovered that the home screen on Vandenberg's phone displayed the Taliban flag. Investigators further determined that Vandenberg had worn a custom-made shirt bearing the word "AMALEK" during his visit to the travel center, which he stated meant "destroyer of Jews."

A review of Vandenberg's phone revealed antisemitic, anti-Israel, anti-U.S., and extremist content, including internet searches and messages expressing hostility toward Jews and Israel. According to court records, investigators found messages indicating that Vandenberg viewed the United States government as being controlled by Israel and Jewish people and that those beliefs motivated his desire to target law enforcement officers at the protests. Prosecutors argued that his conduct was driven by extremist, antisemitic views and posed a grave threat to public safety.

On January 12, 2026, following a five-day jury trial, a federal jury convicted Vandenberg of transportation of explosives with intent to kill, injure or intimidate and attempted transportation of prohibited fireworks into California. Upon his release from prison, Vandenberg will be subject to one year of supervised release.

First Assistant U.S. Attorney Ryan Ellison and Justin A. Garris, Special Agent in Charge of the Federal Bureau of Investigation's Albuquerque Field Office, made the announcement today.

The Las Cruces Resident Agency of the Federal Bureau of Investigation's Albuquerque Field Office investigated this case with assistance from the Tucson Resident Agency of the Federal Bureau of Investigation's Phoenix Field Office, Tucson Police Department, U.S. Air Force Office of Special Investigations, and Homeland Security Investigations (HSI) El Paso. The Las Cruces Branch Office of the U.S. Attorney's Office for the District of New Mexico is prosecuting the case.