John J. Clowar
Agency patch
Patrolman

John J. Clowar

Trenton Police Department — Trenton, NJ
Felonious
End of Watch November 16, 1964
Age 29
Tour of Duty 4 yrs
Badge 189
The Vigil Panel 100 ›
Gender Male

Incident

Patrolman Clowar was killed while responding to a report of a man attempting to blow up a tavern. The bar owner was able to lock the man outside of the bar before Patrolman Clowar and his partner arrived. As Patrolman Clowar approached the door the suspect pulled the pin on a hand grenade. The grenade detonated, killing the suspect, an acquaintance, and Patrolman Clowar. Patrolman Clowar had served with the agency for 4 years.

Survivors

He was survived by his wife and three children.

In Our Keeping

Permanent identifier
BO-US-NJ-3588A30C
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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Tributes

I never knew you. I am standing here anyway.
Patrolman Clowar gave the Trenton Police Department 4 years.
Thank you for your service to the Trenton community. Gone but never to be forgotten.
Rest easy, Patrolman Clowar.

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

Agency

Type Police Department
Location Trenton, Mercer County, NJ
Platform Identity tpd.mercer.nj.us.gov.nw

Service Record

End of Watch November 16, 1964
Tour of Duty 4 yrs
Age 29
Badge Number 189
Gender Male

Incident Details

Cause Felonious
Weapon Explosives

Patrolman John J. Clowar 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 97,772 officers honored here.

In NJ, 229 of 646 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 35.4% of this state's fallen. That is 35.4 percentage points above the national rate of 0%.

At Trenton 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.

Trenton Police Department
5
of 7 officers
71.4% Felonious
NJ — Statewide
229
of 646 officers
35.4% Felonious
Nationwide
1
of 97,772 officers
0% Felonious

National Cause Distribution

How Felonious compares to all causes of officer death in the memorial record. John J. Clowar's cause is highlighted.

Felonious
1 (0%)
Accident
1 (0%)
Illness
1 (0%)
Cardiac
1 (0%)
Undetermined
1 (0%)
Suicide
1 (0%)

How John J. Clowar Compares

Age at Death
29
This officer
Avg for Felonious: 39.0 years
Years of Service
4
This officer
Avg for Felonious: 8.4 years

When Felonious Deaths Occur

Monthly distribution of Felonious deaths across the full memorial record. John J. Clowar is highlighted in Nov.

Jan
1,392
Feb
1,295
Mar
1,373
Apr
1,516
May
1,504
Jun
1,442
Jul
1,587
Aug
1,517
Sep
1,491
Oct
1,371
Nov
1,447
Dec
1,624

Weapons Used Against Officers

Most common weapons in felonious officer deaths. John J. Clowar was killed by explosives.

Handgun
3,684
Gun
3,592
Gun; Unknown type
1,492
Shotgun
1,109
Rifle
935
Officer's handgun
909