Thomas J. O'Sullivan
Agency patch
Constable

Thomas J. O'Sullivan

Felonious
End of Watch July 12, 1907
Age 30
The Vigil Panel 21 ›
Gender Male

Incident

Constable Thomas O'Sullivan was shot and killed as he and another constable confronted two burglars at the Pittsburgh, Bessemer & Lake Erie Railroad station in East Pittsburgh.

Constable John O'Brien was at home when he had been alerted to two suspicious mean in East Pittsburgh at approximately 10:25 pm and called on Constable O'Sullivan to accompany him. They located the man and followed them to the railroad station. As the constables stood in the shadows they observed one the men walk away to serve as a lookout as the other man opened a window to the railroad office.

As he prepared to climb inside the constables confronted him and arrested him. Constable O`Sullivan began walking him to jail as Constable O'Brien started after the lookout.

As Constable O'Sullivan and the man walked through an alley the man suddenly pulled out a revolver and shot him twice, killing him instantly. Hearing the shots, Constable O'Brien ran into the alley and started struggling with the man before he was shot three times, including once in the head.

Both suspects fled the scene. It is not known if they were ever arrested.

Constable O'Brien was taken to the hospital in Braddock Borough. His health continued to deteriorate and it is believed he passed away from his wound in October 1907, but his death has not been verified.

Constable O'Sullivan was the elected constable of the Braddock Borough Third Ward. He also held commissions as a police officer for Braddock Borough and as a detective for the Pittsburgh, Bessemer & Lake Erie Railroad.

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Last updated
September 9, 2026

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Tributes

I never knew you. I am standing here anyway.
Constable O'Sullivan served with the Pennsylvania State Constable.
Thank you for your service to the Pittsburgh community. Gone but never to be forgotten.
Rest easy, Constable O'Sullivan.

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

Agency

Type Other
Location Pittsburgh, Allegheny County, PA
Platform Identity pscacco.allegheny.pa.us.gov.nw

Service Record

End of Watch July 12, 1907
Age 30
Gender Male

Incident Details

Cause Felonious
Cause Detail Gunfire
Weapon Handgun; Revolver

The Sacrifice · Felonious

Thomas is one of 15,743 officers killed feloniously in the United States, 57.1% of the 27,551 remembered there.

33,917 officers are remembered on this memorial. Each number below is one of them.

  1. See the roll
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Compare against
I

Time

In 1907, 108 officers in the United States were killed feloniously, the 46th heaviest of 213 years on record. The heaviest was 1921, with 248.

Every year on record · United States
II

Who

Thomas was 30. Of the 14,220 killed feloniously in the United States whose age is recorded, half were between 31 and 47; the middle age was 38.

Age at death
Where he stood among them
Age by years of service
III

When

July holds 9.3% of these deaths in the United States; December holds the most, 9.4%. Fridays: 14.3%.

By month
By day of the week
IV

How

Felonious deaths account for 57.1% of all 27,551 deaths in the United States, the most common cause. The weapon recorded was handgun; revolver, in 0.9% of these deaths.

Every cause
Weapons recorded
V

His people

Pennsylvania State Constable - Allegheny County has 11 officers remembered here, Thomas among them.

Constable Thomas J. O'Sullivan

Pennsylvania State Constable - Allegheny County · End of Watch July 12, 1907

Where the Name Is Cut

National Law Enforcement Officers Memorial · Panel 50-W

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