Rancho Bernardo, San Diego, CA, December 6, 2025
Son Thanh Nguyen, a 46-year-old from San Diego, has pleaded guilty for his failed attempt to use explosives to rob an ATM outside a bank in Rancho Bernardo. The incident took place during the early morning hours when Nguyen inserted an improvised explosive device into the ATM. Although the ATM was destroyed, no cash was stolen. His sentencing is pending, with a maximum penalty of 20 years in prison and a $250,000 fine.
San Diego Man Pleads Guilty to ATM Break-In Attempt Using Explosives
San Diego, CA – Son Thanh Nguyen, 46, of San Diego, pleaded guilty in federal court on December 4, 2025, to using explosives in an unsuccessful attempt to steal cash from an ATM outside a First Citizens Bank branch in Rancho Bernardo.
Details of the Incident
On June 28, 2024, Nguyen approached the ATM during the early morning hours and inserted an improvised explosive device into the machine’s cash dispenser slot. The device caused the ATM to be destroyed, but no cash was obtained. Surveillance footage from the bank was used to track the license plate of the vehicle Nguyen drove to and from the scene.
Investigation and Evidence
Approximately two months later, investigators searched Nguyen’s residence and found chemicals and equipment used to construct the explosive device, as well as clothing consistent with those worn during the attempt. Nguyen pleaded guilty to a count of malicious use of fire and explosive materials to damage property.
Background Context
ATM break-ins using explosives have been a growing concern in California. In August 2025, a man was arrested in Orange County for using a bomb to steal from an ATM at a San Ramon Target store. This individual was linked to an international heist crew accused of stealing millions from ATMs along the West Coast.
Legal Proceedings
Nguyen’s sentencing is scheduled for a later date. The maximum penalty for this offense is 20 years in prison and a $250,000 fine.
Frequently Asked Questions (FAQ)
What was Son Thanh Nguyen charged with?
Son Thanh Nguyen was charged with malicious use of fire and explosive materials to damage property.
When did the incident occur?
The incident occurred on June 28, 2024.
What was the outcome of the incident?
The ATM was destroyed, but no cash was obtained.
What evidence was found during the investigation?
Investigators found chemicals and equipment used to construct the explosive device, as well as clothing consistent with those worn during the attempt.
What is the maximum penalty for this offense?
The maximum penalty is 20 years in prison and a $250,000 fine.
Key Features of the Incident
| Feature | Details |
|---|---|
| Location | Rancho Bernardo, San Diego, CA |
| Defendant | Son Thanh Nguyen, 46, San Diego resident |
| Offense | Malicious use of fire and explosive materials to damage property |
| Incident Date | June 28, 2024 |
| ATM Status | Destroyed; no cash obtained |
| Investigation Findings | Chemicals and equipment for explosive device; matching clothing |
| Maximum Penalty | 20 years in prison and $250,000 fine |
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