Incident
Officer Gary Mills was shot and killed as he and another officer were leaving the scene of a domestic disturbance call in a local trailer park. A man with no connection to the initial call came out of a nearby trailer and opened fire with a 12-gauge shotgun, striking Officer Mills in the back. A reserve officer with Officer Mills returned fire and wounded the suspect before arresting him. Officer Mills was transported to a local hospital where he succumbed to his wounds while in surgery. On April 2, 1974, the suspect, 25, was convicted of second degree murder and sentenced to 40 years.
Survivors
Officer Mills was survived by his wife.
In Our Keeping
- Permanent identifier
BO-US-CO-19BC2B85- 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
I never knew you. I am standing here anyway.
Officer Mills served with the Boulder Police Department.
Thank you for your service to the Boulder community. Gone but never to be forgotten.
Rest easy, Officer Mills.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Officer Gary Dale Mills is one of 17,623 officers killed feloniously — deliberately targeted and murdered in the line of duty across the full record of this memorial — 54.2% of all 32,508 officers honored here.
In CO, 235 of 360 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 65.3% of this state's fallen. That is 11.1 percentage points above the national rate of 54.2%.
At Boulder Police Department, 5 of 7 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 71.4% of this agency's fallen.
National Cause Distribution
How Felonious compares to all causes of officer death in the memorial record. Gary Dale Mills's cause is highlighted.
How Gary Dale Mills Compares
Offender Outcome
Sentenced to 40 years
When Felonious Deaths Occur
Monthly distribution of Felonious deaths across the full memorial record. Gary Dale Mills is highlighted in Aug.
Weapons Used Against Officers
Most common weapons in felonious officer deaths. Gary Dale Mills was killed by shotgun; 12 gauge.
Others Who Wore This Badge
6 officers from Boulder Police Department are honored on badge.nw.





