Alameda County Sheriff's Office, California
End of Watch Tuesday, July 19, 1898
Add to My HeroesJohn J. Lerri
Deputy Constable John Lerri was one of five deputies killed as a result of a powder magazine explosion in pursuit of a suspected murderer.
He served 5 years as a law enforcement officer and was survived by his wife, eight children, and his mother.
Deputy Daniel Cameron, Constable Gustave Koch, Deputy John Lerri, Deputy Charles White, and Deputy George Woodsum were killed when a powder magazine containing a barricaded murder suspect exploded at 5:18 a.m. The suspect was an employee of the California Fuse and Explosive Works Company and had murdered a coworker during a dispute over Chinese lottery tickets.
The suspect fled into the powder keg, which contained 5 tons of powder, and threatened to blow it up if anyone attempted to arrest him. The standoff continued overnight and into the morning until the suspect called Deputy White and told him he was ready to come out.
As the other deputies approached the magazine, it suddenly exploded, killing the five deputies, a female bystander, and the suspect and seriously injuring two other deputies. The California Fuse and Explosive Works Company was located in the current-day Melrose area of Oakland. The blast caused damage as far north as 13th Avenue, east on Merrill Avenue, and south to San Leandro.
Bio
- Age 44
- Tour 5 years
- Badge Not available
Incident Details
- Cause Explosion
Most Recent Reflection
View all 14 ReflectionsDeputy Constable Lerri,
On today, the 125th anniversary of your death I would just like to say thank you to you and your fellow Officers who were also killed in that incident for your service and sacrifice for the citizens of Alameda County.
R.I.P.
USBP
Anonymous
United States Border Patrol
July 19, 2023
Recent LODD Deaths

Lieutenant Eddie Mays
Bernie Police Department, MO
EOW: June 5, 2025

Police Officer Gabriel Facio
Apache Junction Police Department, AZ
EOW: June 8, 2025

Police Officer Krystal Rivera
Chicago Police Department, IL
EOW: June 5, 2025

Sergeant J. D. White
Angleton Police Department, TX
EOW: June 1, 2025

Police Officer Timothy Ontiveros
Bloomfield Police Department, NM
EOW: June 1, 2025

Police Officer Samuel Riveros
Baldwin Park Police Department, CA
EOW: May 31, 2025

Deputy Sheriff Daniel Weston Sherrer
Morrow County Sheriff's Office, OH
EOW: May 26, 2025

Deputy Sheriff Nathaniel Ansay
Florence County Sheriff's Office, SC
EOW: May 20, 2025

Lieutenant Allen "Noochie" Credeur
Rayne Police Department, LA
EOW: May 5, 2025