Patrick J. O'Neill

Chicago Police Department — Chicago, IL

Felonious

End of Watch March 23, 1921

Age 45

Tour of Duty 14 yrs 4 mo

Badge 2963

The Vigil Panel 40 ›

Gender Male

Incident Service The Sacrifice Department 570

Incident

Patrolman Patrick J. O'Neill was shot and killed at 10:00 pm in the rear of 6415 Washtenaw Avenue as he and several other police officers attempted to make an arrest. When Patrolman O'Neill and fellow officers surrounded the building, the gunman ran out the rear door and opened fire. Patrolman O'Neill suffered multiple gunshot wounds and succumbed to his injuries at 11:30 pm the same day. The brother-in-law and sister of the killer were arrested and, on April 22, 1921, indicted on the charge of accessory to murder. On July 30, 1921, the killer was arrested in St. Paul, Minnesota. On September 28, 1921, the case against the killers. The brother-in-law and sister were nolle prossed (dismissed.) On October 14, 1921, Officer O'Neill's killer was sentenced to hang on December 15, 1921. He escaped from the County Jail on December 11, 1921. He was never recaptured; It was reported that he died in 1951. In 1927 the suspect was responsible for planning a robbery of a pharmacy in Detroit, Michigan. A gunfight resulted in the deaths of the two suspects and Officer Stacey C. Mizner of the Detroit Police Department. Patrolman O'Neill had served with the Chicago Police Department for over 14 years assigned to the Detective Bureau.

Survivors

He was survived by his wife and three children.

In Our Keeping

Permanent identifier: BO-US-IL-94600E03
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.
Detective Patrolman O'Neill gave the Chicago Police Department 14 years.
Thank you for your service to the Chicago community. Gone but never to be forgotten.
Rest easy, Detective Patrolman O'Neill.

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

Agency

Department Chicago Police Department

Location Chicago, IL

Platform Identity cpd.cook.il.us.gov.nw

Service Record

End of Watch March 23, 1921

Tour of Duty 14 yrs 4 mo

Age 45

Badge Number 2963

Gender Male

Incident Details

Cause Felonious

Weapon Gun; Unknown type

Offender Escaped from prison

Detective Patrolman Patrick J. O'Neill 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 IL, 842 of 1,318 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 63.9% of this state's fallen. That is 9.7 percentage points above the national rate of 54.2%.

At Chicago Police Department, 396 of 571 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 69.4% of this agency's fallen.

Chicago Police Department

396

of 571 officers

69.4% Felonious

IL — Statewide

842

of 1,318 officers

63.9% Felonious

Nationwide

17,623

of 32,508 officers

54.2% Felonious