William John Antoniewicz

Utah Highway Patrol — Salt Lake City, UT

Felonious

End of Watch December 8, 1974

Age 27

Tour of Duty 5 mo

The Vigil Panel 114 ›

Gender Male

Incident Service The Sacrifice Department 15

Incident

Trooper Bill Antoniewicz was shot during a traffic stop for speeding on I-80, eight miles east of Echo Junction. While approaching the vehicle, the suspect shot him several times with a .38-caliber handgun. The man then kicked Trooper Antoniewicz in the face several times before fleeing. Unknown to Trooper Antoniewicz, the subject had stolen evidence in a narcotics case from the Evanston (Wyoming) Jail earlier that evening. Afraid of being arrested, he shot Trooper Antoniewicz. The suspect was apprehended 18 months later. The first trial resulted in a hung jury, and the man pled guilty to a reduced charge of second-degree murder in order to avoid a second trial. He was released after serving 12 years of a 15-year sentence. Trooper Antoniewicz had served with the Utah Highway Patrol for five months.

Survivors

He was survived by his parents and sister.

In Our Keeping

Permanent identifier: BO-US-UT-8FDE0321
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.
Trooper Antoniewicz served with the Utah Highway Patrol.
Thank you for your service to the people of Utah. Gone but never to be forgotten.
Rest easy, Trooper Antoniewicz.

— S. Vincent Anthony, U.S. Army 1985-1993

Agency

Department Utah Highway Patrol

Location Salt Lake City, UT

Platform Identity uhp.ut.us.gov.nw

Service Record

End of Watch December 8, 1974

Tour of Duty 5 mo

Age 27

Gender Male

Incident Details

Cause Felonious

Weapon Handgun; .38 caliber

Offender Paroled

Trooper William John Antoniewicz 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 UT, 84 of 138 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 60.9% of this state's fallen. That is 6.7 percentage points above the national rate of 54.2%.

At Utah Highway Patrol, 7 of 16 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 43.8% of this agency's fallen.

Utah Highway Patrol

of 16 officers

43.8% Felonious

UT — Statewide

of 138 officers

60.9% Felonious

Nationwide

17,623

of 32,508 officers

54.2% Felonious