Roll of Honor
Mark Gregory Diebold
Incident
Deputy Constable Mark Diebold suffered a fatal heart attack following qualifications for the agency's tactical team.
Members of the tactical team immediately began CPR when he collapsed following the qualifications. He was transported to Alliance Medical Center where he was pronounced dead.
Deputy Diebold had served with the Tarrant County Constable's Office - Precinct 5 for nine years and had previously served with the Tarrant County Sheriff's Office for 14 years.
Survivors
He is survived by his wife and three children.
In Our Keeping
- Permanent identifier
BO-US-TX-58954A67- 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
23 years. You could have gone home.
Deputy Constable Diebold gave the Tarrant County Constable's Office 23 years. Still answering calls at the end.
Thank you for your service to the Fort Worth community. Gone but never to be forgotten.
Rest easy, Deputy Constable Diebold.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Deputy Constable Mark Gregory Diebold 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 TX, 88 of 2,421 officers were lost to cardiac events in the line of duty — 3.6% of this state's fallen.
At Tarrant County Constable's Office - Precinct 5, 1 of 2 officers on record were lost to cardiac events in the line of duty — 50% of this agency's fallen.
National Cause Distribution
How Cardiac compares to all causes of officer death in the memorial record. Mark Gregory Diebold's cause is highlighted.
How Mark Gregory Diebold Compares
When Cardiac Deaths Occur
Monthly distribution of Cardiac deaths across the full memorial record. Mark Gregory Diebold is highlighted in Sep.
Others Who Wore This Badge
1 officer from Tarrant County Constable's Office - Precinct 5 are honored on badge.nw.
