Senior Corporal Mark Timothy Nix

Senior Corporal Mark Timothy Nix

Dallas Police Department, Texas

End of Watch Friday, March 23, 2007

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Mark Timothy Nix

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.

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. He is survived by his fiancee, parents, and sister.


  • Age 33
  • Tour 7 years
  • Badge 7906
  • Military Veteran

Incident Details

  • Cause Gunfire
  • Weapon Gun; Unknown type
  • Offender Sentenced to death

murder suspect, vehicle pursuit

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Thank you for both your military and law enforcement service and know that your service and sacrifice will never be forgotten by your your law enforcement family.

Detective Cpl/3 Steven Rizzo
Delaware State Police (Retired)

March 25, 2022

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