Incident
Patrolman William Mateer drowned while attempting to rescue a fisherman who had fallen through the ice on Ponkapoag Pond in Canton. The fisherman also drowned in the incident.
In Our Keeping
- Permanent identifier
BO-US-MA-1D82A19B- 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 Mateer served with the Metropolitan Police Department.
Thank you for your service to the Boston community. Gone but never to be forgotten.
Rest easy, Patrolman Mateer.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Patrolman William Mateer 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 MA, 158 of 469 officers were lost to accidents in the line of duty — 33.7% of this state's fallen. That is 2.7 percentage points above the national rate of 31%.
At Metropolitan Police Department, 7 of 12 officers on record were lost to accidents in the line of duty — 58.3% of this agency's fallen.
National Cause Distribution
How Accident compares to all causes of officer death in the memorial record. William Mateer's cause is highlighted.
How William Mateer Compares
When Accident Deaths Occur
Monthly distribution of Accident deaths across the full memorial record. William Mateer is highlighted in Jan.
Incident Location
Others Who Wore This Badge
11 officers from Metropolitan Police Department are honored on badge.nw.










