Roll of Honor
Incident
Deputy Sheriff Dennis Riley was killed in an automobile crash at the intersection of Route 228 and U.S. Route 301 in Waldorf, Maryland. As he waited for a traffic light to change, a tractor-trailer fuel tanker skidded to a stop and overturned on his patrol car, killing him instantly. Deputy Riley was a United States Marine Corps Vietnam War veteran and served with the Charles County Sheriff's Office for five years.
Survivors
He was survived by his wife and four children.
In Our Keeping
- Permanent identifier
BO-US-MD-534A05D9- 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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Also honored at salute.nw — U.S. Marine Corps. One record, 2 gates. Dennis is one person.
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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 Riley gave the Charles County Sheriff's Office 5 years.
Thank you for your service to the La Plata 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
Dennis Leo Riley served in the U.S. Marine Corps before joining law enforcement.
Deputy Sheriff Dennis Leo Riley is one of 1 officers lost to accidents in the line of duty across the full record of this memorial — 0% of all 97,759 officers honored here.
In MD, 140 of 377 officers were lost to accidents in the line of duty — 37.1% of this state's fallen. That is 37.1 percentage points above the national rate of 0%.
At Charles County Sheriff's Office, 3 of 6 officers on record were lost to accidents in the line of duty — 50% of this agency's fallen.
National Cause Distribution
How Accident compares to all causes of officer death in the memorial record. Dennis Leo Riley's cause is highlighted.
How Dennis Leo Riley Compares
When Accident Deaths Occur
Monthly distribution of Accident deaths across the full memorial record. Dennis Leo Riley is highlighted in Jan.
Incident Location
Military Service
Dennis Leo Riley served in the U.S. Marine Corps before joining law enforcement.
Visit Dennis Leo Riley’s page on salute.nw →
His full service record — units, decorations, where he served — is kept on salute.nw.
Others Who Wore This Badge
5 officers from Charles County Sheriff's Office are honored on badge.nw.
