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Incident
Police Officer Adam Liddle suffered a fatal heart attack following a shift in which he responded to a burglary in progress and a shots fired call.
Officer Liddle had served with the Waterloo Police Department for three years and had previously served with the Black Hawk County Sheriff's Office for two years.
Survivors
He is survived by his wife and son.
In Our Keeping
- Permanent identifier
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- 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.
Police Officer Liddle gave the Waterloo Police Department 5 years.
Thank you for your service to the Waterloo community. Gone but never to be forgotten.
Rest easy, Police Officer Liddle.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
The Sacrifice · Cardiac
Waterloo Police Department has lost 8 officers; 1 of them lost to cardiac events.
Adam is one of 11 officers lost to cardiac events in IA, 4.9% of the 226 remembered there.
Adam is one of 1,307 officers lost to cardiac events in the United States, 4.7% of the 27,551 remembered there.
Adam is one of 1,309 officers lost to cardiac events worldwide, 3.9% of the 33,917 remembered here.
33,917 officers are remembered on this memorial. Each number below is one of them.
Time
In 2015, 1 officer in IA was lost to cardiac events, more than in any other year.
In 2015, 21 officers in the United States were lost to cardiac events, the 7th heaviest of 139 years on record. The heaviest was 2014, with 24.
In 2015, 21 officers worldwide were lost to cardiac events, the 7th heaviest of 139 years on record. The heaviest was 2014, with 24.
Who
Adam was 35. Of the 11 lost to cardiac events in IA whose age is recorded, half were between 46 and 55; the middle age was 51. Adam had served 5 years; the middle length of service was 9 years.
Adam was 35. Of the 1,249 lost to cardiac events in the United States whose age is recorded, half were between 43 and 55; the middle age was 48. Adam had served 5 years; the middle length of service was 15 years.
Adam was 35. Of the 1,251 lost to cardiac events worldwide whose age is recorded, half were between 42.5 and 55; the middle age was 48. Adam had served 5 years; the middle length of service was 15 years.
When
October holds 36.4% of these deaths in IA, more than any other month. Thursdays: 36.4%.
October holds 9.3% of these deaths in the United States; January holds the most, 9.6%. Thursdays: 14.5%.
October holds 9.3% of these deaths worldwide; January holds the most, 9.5%. Thursdays: 14.5%.
How
Cardiac deaths account for 12.5% of all 8 deaths at Waterloo Police Department, the 3rd most common cause.
Cardiac deaths account for 4.9% of all 226 deaths in IA, the 4th most common cause.
Cardiac deaths account for 4.7% of all 27,551 deaths in the United States, the 4th most common cause.
Cardiac deaths account for 3.9% of all 33,917 deaths worldwide, the 4th most common cause.
His people
Waterloo Police Department has 8 officers remembered here, Adam among them.
Where
Where the Name Is Cut
National Law Enforcement Officers Memorial · Panel 60-W
What is kept
Photographs, film, sound and papers — what survived a life.
Others Who Wore This Badge
7 officers from Waterloo Police Department are honored on badge.nw.
