Roll of Honor
Incident
Deputy Sheriff Mark Cox suffered a fatal heart attack while conducting canine training on the 600 block of County Road 202 in Liberty Hill, Texas, at 10:00 am.
Deputy Cox was a U.S. Navy veteran and had served with the Real County Sheriff's Office for three years and had previously served with the Edwards County Sheriff's Office for five years. He had also previously served with a law enforcement agency in Florida.
Survivors
He is survived by his wife and two children.
In Our Keeping
- Permanent identifier
BO-US-TX-4F940CC9- 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. Navy. One record, 2 gates. Mark 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 Cox gave the Real County Sheriff's Office 8 years.
Thank you for your service to the Leakey community. Thank you 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
Mark Allan Cox served in the U.S. Navy before joining law enforcement.
Deputy Sheriff Mark Allan Cox is one of 1 officers lost to cardiac events in the line of duty across the full record of this memorial — 0% of all 97,759 officers honored here.
In TX, 88 of 2,421 officers were lost to cardiac events in the line of duty — 3.6% of this state's fallen. That is 3.6 percentage points above the national rate of 0%.
National Cause Distribution
How Cardiac compares to all causes of officer death in the memorial record. Mark Allan Cox's cause is highlighted.
How Mark Allan Cox Compares
When Cardiac Deaths Occur
Monthly distribution of Cardiac deaths across the full memorial record. Mark Allan Cox is highlighted in Sep.
Incident Location
Military Service
Mark Allan Cox served in the U.S. Navy before joining law enforcement.
Visit Mark Allan Cox’s page on salute.nw →
His full service record — units, decorations, where he served — is kept on salute.nw.
Others Who Wore This Badge
0 officers from Real County Sheriff's Office are honored on badge.nw.