Roll of Honor
Incident
Detective Sergeant Mason Griffith was shot and killed at Casey's Convenience Store at 115 Highway 19 in Hermann around 9:30 pm.
Sergeant Griffith and another officer were responding to a disturbance at a convenience store. When the officers arrived, a shootout occurred. Both officers were shot. One officer is in serious but stable condition. Sergeant Griffith succumbed to his injuries at Hermann Area District Hospital.
The subject shot both officers and fled the scene. He has a long history of criminal charges, with multiple outstanding felony warrants. Additionally, there is a warrant for his arrest for not showing up to court in 2022. He barricaded himself in a home near the shooting and was taken into custody the next day at 2 pm by the Missouri Highway Patrol SWAT team. He stated that he wanted to commit suicide by cop. He was convicted of first-degree murder and nine additional charges.
Sergeant Mason had served with the Hermann Police Department for over 12 years and was the part-time Chief of Police of the Rosebud Police Department and Reserve Deputy Sheriff of the Gasconade County Sheriff's Office.
Survivors
He is survived by his wife, two sons, mother, and father.
In Our Keeping
- Permanent identifier
BO-US-MO-E7B865B5- Stewardship
- Maintained by NeuraWeb Global Inc.
- Added to badge.nw
- April 2, 2026
- Last updated
- July 23, 2026
Honored here by 1 sentinel - 1 tribute.
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Tributes
I never knew you. I am standing here anyway.
Detective Sergeant Griffith gave the Hermann Police Department 12 years.
Thank you for your service to the Hermann community. Gone but never to be forgotten.
Rest easy, Detective Sergeant Griffith.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Detective Sergeant Mason Griffith is one of 17,623 officers killed feloniously — deliberately targeted and murdered in the line of duty across the full record of this memorial — 54.2% of all 32,508 officers honored here.
In MO, 516 of 813 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 63.5% of this state's fallen. That is 9.3 percentage points above the national rate of 54.2%.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. Mason Griffith's cause is highlighted.
How Mason Griffith Compares
Offender Outcome
Guilty of first-degree murder
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Mason Griffith is highlighted in Mar.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Mason Griffith was killed by gun; unknown type.