Lawrence Robb Costello

Royal Canadian Mounted Police — ON

Felonious

End of Watch August 10, 2018

The Vigil Panel 217 ›

Gender Male

Incident Service The Sacrifice Department 332

Incident

On August 10, 2018 45 year old Constable Lawrence Robb Costello and Constable Sara Mae Burns were shot and killed responding to a shots fired call. At approximately 7:00 am, the Fredericton Police Force received calls of shots being fired in the 200 block of Brookside Drive. Constables Castello and Burns responded and arrived on scene to observe two people lying on the ground. A lone gunman, shooting from a position of advantage from the third floor of the apartment complex shot and killed both officers. The area was locked down by police during which time the suspect was engaged in a shootout with the police. At approximately 9:45 AM, the suspect was taken in custody and transported to the hospital. Constable Costello was a 20 year veteran working on many teams and units within the Department, including being a detective, as well as being seconded to the RCMP Child Exploitation Unit. Robb is survived by his wife and four children. Our condolences go out to the family, friends and colleagues. As we start 2026, we can look back and note that we have been very fortunate to not have lost anyone in Canada to a Line of Duty Death (LODD) these last two years. Since the launch of the Memorial Rib… Photo: Memorial Ribbon Society Directors Shawn Coady & James Pearson with Tumbleweed Spirits Co-Owner Mike Patterson Police and Peace Officers’ Memorial Ribbon Society Directors Shawn Coady and …

Survivors

Robb is survived by his wife and four children.

In Our Keeping

Permanent identifier: BO-CA-FED-29407919
Stewardship: Maintained by NeuraWeb Global Inc.
Added to badge.nw: April 8, 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.
Officer Robb Costello served with the Royal Canadian Mounted Police.
Thank you for your service. Gone but never to be forgotten.
Rest easy, Robb Costello.

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

Agency

Department Royal Canadian Mounted Police

Location ON

Platform Identity rcmp.fed.ca.gov.nw

Service Record

End of Watch August 10, 2018

Gender Male

Incident Details

Cause Felonious

Lawrence Robb Costello 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 ON, 75 of 334 officers were killed feloniously — deliberately targeted and murdered in the line of duty — 22.5% of this state's fallen. That is 31.7 percentage points below the national rate of 54.2%.

At Royal Canadian Mounted Police, 75 of 333 officers on record were killed feloniously — deliberately targeted and murdered in the line of duty — 22.5% of this agency's fallen.

Royal Canadian Mounted Police

of 333 officers

22.5% Felonious

ON — Statewide

of 334 officers

22.5% Felonious

Nationwide

17,623

of 32,508 officers

54.2% Felonious