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Yolo Today
By the People, for the People
Ex-Sheriff's Lieutenant Charged in Deadly California Fireworks Blast
Authorities say illegal fireworks operation led to explosion that killed 7 workers
Apr. 11, 2026 at 6:19am
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The devastating aftermath of an illegal fireworks operation that claimed seven lives and exposed systemic failures in oversight and enforcement.Yolo TodayA former Yolo County Sheriff's Office lieutenant is among five people charged with murder following a fireworks warehouse explosion that killed seven workers in Esparto, California, last summer. Authorities allege the lieutenant, Samuel Machado, illegally stored 1 million pounds of fireworks on his property and used his position to shield the operation from scrutiny for years.
Why it matters
The allegations against a former law enforcement officer and the apparent failure of oversight suggest a breakdown in public trust and a potential systemic issue regarding enforcement of regulations, even when clear warnings were present. The tragedy highlights the need for stronger oversight and enforcement of dangerous materials storage, especially when connected to public officials.
The details
Machado is accused of illegally storing 1 million pounds of fireworks on his property and allegedly using his position with the Sheriff's Office to shield the operation from scrutiny for years. Devastating Pyrotechnics LLC and Blackstar Fireworks, Inc. are accused of manufacturing and storing explosives on Machado's property. Authorities say the county was aware of the illegal operation for at least three years prior to the explosion but failed to take action.
- The explosion occurred on July 1, 2025.
- A county official received a tip about the illegal operation in June 2022 but was advised to 'tread lightly' due to Machado's affiliation with the Sheriff's Office.
The players
Samuel Machado
A former Yolo County Sheriff's Office lieutenant who is accused of illegally storing 1 million pounds of fireworks on his property and using his position to shield the operation from scrutiny.
Kenneth Chee
The owner of Devastating Pyrotechnics, one of the companies accused of manufacturing and storing explosives on Machado's property.
Jack Lee
The operations manager of Devastating Pyrotechnics.
Gary Chan Jr.
One of the individuals charged in connection with the fireworks explosion.
Douglas Tollefsen
One of the individuals charged in connection with the fireworks explosion.
What they’re saying
“The allegations against a former law enforcement officer and the apparent failure of oversight suggest a breakdown in public trust and a potential systemic issue regarding enforcement of regulations, even when clear warnings were present.”
— Expert Insight
What’s next
The defendants are scheduled to be arraigned on Monday. Chee and another defendant arrested outside the county will be arraigned after being transferred to local custody.
The takeaway
This tragic incident highlights the critical need for stronger oversight and enforcement of regulations surrounding the storage and handling of dangerous materials, especially when connected to public officials. The breakdown in accountability and the apparent lack of action despite clear warning signs raise serious concerns about systemic issues that must be addressed to prevent similar disasters in the future.
