Roll of Honor
Incident
Marshal Henry Knapp was shot and killed with his own service revolver while attempting to serve a warrant in the Hopkinsville area of the city. As he entered the boarding house he encountered a woman standing in the hallway. Several subjects, including the woman, held him at gunpoint. One of the men disarmed him and forced him to leave the house. He was then ordered back into the house where the man took his badge and the warrant, and then shot him in the head. Marshal Knapp was taken to a hospital in Cincinnati where he succumbed to his wounds two weeks later. The man and woman were both convicted of Marshal Knapp's murder and sentenced to life in prison. The woman was paroled in 1936. On March 30, 1960, Governor Michael V. DiSalle changed the man's conviction from first to second degree murder making him eligible for parole. Marshal Knapp had served with the Addyston Police Department for two years.
Survivors
He was survived by his wife and three children and is buried at Maple Grove Cemetery in Cleves, Ohio.
In Our Keeping
- Permanent identifier
BO-US-OH-3EF908F0- 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.
Marshal Knapp gave the Addyston Police Department 2 years.
Thank you for your service to the Addyston community. Gone but never to be forgotten.
Rest easy, Marshal Knapp.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Marshal Henry Knapp 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 OH, 572 of 991 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 57.7% of this state's fallen. That is 3.5 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. Henry Knapp's cause is highlighted.
How Henry Knapp Compares
Offender Outcome
Sentenced to life
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Henry Knapp is highlighted in Mar.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Henry Knapp was killed by officer's handgun.