Roll of Honor
Incident
Deputy Sheriff Cass Nemmers suffered a fatal heart attack shortly after performing a physical fitness test at the Iowa Law Enforcement Academy at Camp Dodge, Iowa.
He had just completed the 1-1/2 mile run and other required exercises when began showing symptoms of a heart attack. He was flown to a hospital in Des Moines where he was pronounced dead.
Deputy Nemmers had just been promoted to Deputy Sheriff and had served as a detention officer and court security officer with the Polk County Sheriff's Office for seven years.
Survivors
He is survived by his wife and three children.
In Our Keeping
- Permanent identifier
BO-US-IA-31E3ADB4- 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.
Deputy Sheriff Nemmers gave the Polk County Sheriff's Office 7 years.
Thank you for your service to the Des Moines community. Gone but never to be forgotten.
Rest easy, Deputy Sheriff Nemmers.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Deputy Sheriff Cass Gregory Nemmers is one of 1,306 officers lost to cardiac events in the line of duty across the full record of this memorial — 4% of all 32,508 officers honored here.
In IA, 11 of 226 officers were lost to cardiac events in the line of duty — 4.9% of this state's fallen. That is 0.9 percentage points above the national rate of 4%.
At Polk County Sheriff, 1 of 4 officers on record were lost to cardiac events in the line of duty — 25% of this agency's fallen.
National Cause Distribution
How Cardiac compares to all causes of officer death in the memorial record. Cass Gregory Nemmers's cause is highlighted.
How Cass Gregory Nemmers Compares
When Cardiac Deaths Occur
Monthly distribution of Cardiac deaths across the full memorial record. Cass Gregory Nemmers is highlighted in Sep.
Incident Location
Others Who Wore This Badge
3 officers from Polk County Sheriff are honored on badge.nw.
