Incident
Deputy Sheriff Dewey Marshall was shot and killed while accompanying the sheriff of Sedalia, Pettis County, Missouri, to serve a warrant that had been issued on a man in Mitchellville, Iowa. When the officers arrived at the man's rented farmhouse one-half mile northwest of Mitchellville, the man fatally shot Deputy Marshall and wounded the Pettis County sheriff. The man took Deputy Marshall's weapon and fled into a field. The suspect, who was wanted on a hog-stealing charge, surrendered himself to the sheriff ten days later. He was convicted of first-degree murder and sentenced to life in prison on December 17th, 1926. He was paroled in January of 1960. Deputy Marshall was a crack-shot WWI Army veteran.
Survivors
He was survived by his wife and four-year-old daughter.
In Our Keeping
- Permanent identifier
BO-US-IA-262AF394- 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 served 1985 to 1993. You served too, before the badge - different uniform, same idea. You go where you are sent and you do not get to pick the call.
Deputy Sheriff Marshall served with the Polk County Sheriff's Office.
Thank you for your service to the Des Moines community, and for your service before it. Gone but never to be forgotten.
Rest easy, brother.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Military Service
Dewey Marshall served in the United States military before joining law enforcement. Full service record available on salute.nw.
Deputy Sheriff Dewey Marshall 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 IA, 129 of 226 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 57.1% of this state's fallen. That is 2.9 percentage points above the national rate of 54.2%.
At Polk County Sheriff, 2 of 4 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 50% of this agency's fallen.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. Dewey Marshall's cause is highlighted.
How Dewey Marshall Compares
Offender Outcome
Paroled in 1960
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Dewey Marshall is highlighted in Oct.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Dewey Marshall was killed by shotgun.
Incident Location
Others Who Wore This Badge
3 officers from Polk County Sheriff are honored on badge.nw.


