William F. O'Brien
Agency patch
Patrolman

William F. O'Brien

Accident
End of Watch May 2, 1947
Age 43
Tour of Duty 15 yrs
Badge 855
The Vigil Panel 83 ›
Gender Male

Incident

Patrolman William O'Brien was struck and killed by a vehicle at the intersection of 31st Street and 7th Avenue while on a special traffic detail for the arrival of the President of Mexico. As a fire truck responding to a call approached the intersection, Patrolman O'Brien attempted to halt traffic. A vehicle that failed to stop and entered the intersection. The car was struck by the fire truck and pushed into Patrolman O'Brien. He was knocked down underneath a nearby taxi. He was transported to St. Vincent's Hospital, where he died one hour later. Patrolman O'Brien was assigned to the 10th Precinct and had served with the New York City Police Department for 15 years.

Survivors

He was survived by his wife and four children.

In Our Keeping

Permanent identifier
BO-US-NY-3718D17B
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.
Patrolman O'Brien gave the New York City Police Department 15 years.
Thank you for your service to the New York community. Gone but never to be forgotten.
Rest easy, Patrolman O'Brien.

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

Agency

Location New York, NY
Platform Identity nypd.newyork.ny.us.gov.nw

Service Record

End of Watch May 2, 1947
Tour of Duty 15 yrs
Age 43
Badge Number 855
Gender Male

Incident Details

Cause Accident

Patrolman William F. O'Brien is one of 10,088 officers lost to accidents in the line of duty across the full record of this memorial — 31% of all 32,508 officers honored here.

In NY, 645 of 2,147 officers were lost to accidents in the line of duty — 30% of this state's fallen. That is 1 percentage points below the national rate of 31%.

At New York City Police Department, 283 of 1237 officers on record were lost to accidents in the line of duty — 22.9% of this agency's fallen.

New York City Police Department
283
of 1,237 officers
22.9% Accident
NY — Statewide
645
of 2,147 officers
30% Accident
Nationwide
10,088
of 32,508 officers
31% Accident

National Cause Distribution

How Accident compares to all causes of officer death in the memorial record. William F. O'Brien's cause is highlighted.

Felonious
17,623 (54.2%)
Accident
10,088 (31%)
Illness
2,974 (9.1%)
Cardiac
1,306 (4%)
Undetermined
260 (0.8%)
Suicide
256 (0.8%)
vehicular
1 (0%)

How William F. O'Brien Compares

Age at End of Watch
43
This officer
Avg for Accident: 38.1 years
Years of Service
15
This officer
Avg for Accident: 9.1 years

When Accident Deaths Occur

Monthly distribution of Accident deaths across the full memorial record. William F. O'Brien is highlighted in May.

Jan
820
Feb
730
Mar
748
Apr
707
May
847
Jun
795
Jul
897
Aug
937
Sep
913
Oct
925
Nov
872
Dec
897

Incident Location