Roll of Honor
Incident
Senior Corporal Mark Nix was shot and killed while attempting to apprehend a murder suspect.
Corporal Nix and his partner had responded to backup two plainclothes officers who had spotted a car believed to have been used during a homicide two days earlier. The suspect vehicle crashed in the 4100 block of Bernal Drive following a short pursuit, and the suspect opened fire from inside the car, striking Corporal Nix in the chest, neck, and leg.
Rush-hour traffic prevented ambulances from promptly responding to the scene, so another officer transported Officer Nix to Parkland Memorial Hospital, where he succumbed to his injuries.
The killer remained in his vehicle following an exchange of gunfire with officers in which he was wounded. After an approximate two-hour standoff, members of the Dallas Police Department's SWAT team breached the car and took the man into custody. The subject was convicted of capital murder and was subsequently sentenced to death. He was executed on February 1, 2023.
Senior Corporal Nix was a United States Navy veteran of Operation Desert Storm and had served with the Dallas Police Department for just under seven years.
Survivors
He is survived by his fiancee, parents, and sister.
In Our Keeping
- Permanent identifier
BO-US-TX-6205EC29- 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.
Senior Corporal Nix gave the Dallas Police Department 7 years.
Thank you for your service to the Dallas 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 Timothy Nix served in the U.S. Navy (2003â2003) before joining law enforcement.
Senior Corporal Mark Timothy Nix is one of 1 officers killed feloniously — deliberately targeted and murdered in the line of duty across the full record of this memorial — 0% of all 97,759 officers honored here.
In TX, 1,460 of 2,421 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 60.3% of this state's fallen. That is 60.3 percentage points above the national rate of 0%.
At Dallas Police Department, 55 of 95 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 57.9% of this agency's fallen.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. Mark Timothy Nix's cause is highlighted.
How Mark Timothy Nix Compares
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Mark Timothy Nix is highlighted in Mar.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Mark Timothy Nix was killed by gun; unknown type.
Incident Location
Military Service
Mark Timothy Nix served in the U.S. Navy (2003–2003) before joining law enforcement.
Visit Mark Timothy Nix’s page on salute.nw →
His full service record — units, decorations, where he served — is kept on salute.nw.
Others Who Wore This Badge
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