Roll of Honor
Incident
Police Officer Shaun Diamond succumbed to a gunshot wound sustained the previous day as he and members of the Pomona SWAT team attempted to serve a search warrant.
Officer Diamond was the breach officer as the team attempted to make entry into the home in the 100 block of San Marino Avenue in San Gabriel. As they breached the storm door, the subject inside opened the main door and fired a single shot from a shotgun, striking Officer Diamond in the back of the neck. The shot also wounded the subject's father in the arm.
Other officers immediately pulled Officer Diamond to a safe location, and he was transported to Huntington Memorial Hospital in Pasadena, where he died early the following morning. He had remained on life support so his organs could be donated.
The subject was taken into custody at the scene and charged with the murder of a police officer with special circumstances. He pleaded no contest to voluntary manslaughter and assault with a firearm on a police officer and was sentenced to 10 years.
Officer Diamond had served with the Pomona Police Department for eight years and had previously served with the Los Angeles Police Department and the Montebello Police Department.
In February 2015, Downtown Plaza was renamed to Diamond Plaza with unanimous support. In October 2016, I-10 between 57 Freeway and Towne Avenue was renamed Pomona Police Officer Shaun Diamond Memorial Highway.
Survivors
He is survived by his son, daughter, and parents.
In Our Keeping
- Permanent identifier
BO-US-CA-5F75D9B3- Stewardship
- Maintained by NeuraWeb Global Inc.
- Added to badge.nw
- August 2, 2026
- Last updated
- August 2, 2026
Honored here by 1 tribute.
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Tributes
I never knew you. I am standing here anyway.
Police Officer Diamond gave the Pomona Police Department 16 years.
Thank you for your service to the Pomona community. Gone but never to be forgotten.
Rest easy, Police Officer Diamond.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Police Officer Shaun Richard Diamond is one of 1 officers killed feloniously — deliberately targeted and murdered in the line of duty across the full record of this memorial — 0% of all 97,772 officers honored here.
In CA, 974 of 1,837 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 53% of this state's fallen. That is 53 percentage points above the national rate of 0%.
At Pomona Police Department, 4 of 7 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 57.1% of this agency's fallen.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. Shaun Richard Diamond's cause is highlighted.
How Shaun Richard Diamond Compares
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Shaun Richard Diamond is highlighted in Oct.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Shaun Richard Diamond was killed by shotgun.
Incident Location
Others Who Wore This Badge
6 officers from Pomona Police Department are honored on badge.nw.
