|Agency||Chicago Fire Department|
|Type of Firefighter||Career|
|Age Range||46 to 50|
|Date of Birth||0/0/0|
|Date of Death||4/22/1965|
|Cause of Death||Stress/Overexertion|
|Nature of Death||Heart attack|
|Attribute of Death||[not applicable]|
|Type of Duty||Firehouse duties|
On April 22, 1965, Chicago Fire Department Firefighter John Caplis of Truck 29 suffered a fatal heart attack. Caplis had been assigned to light duty for two years following a previous heart attack in March 1963.
Obituary of John Caplis, Chicago Tribune, April 24, 1965.