| Name | John Caplis |
| Agency | Chicago Fire Department |
| Rank | Firefighter |
| Type of Firefighter | Career |
| Age Range | 46 to 50 |
| Sex | Male |
| 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 |
| Incident Name | N/A |
| Incident City | Chicago |
| Incident State | IL |
| Incident Date | 4/22/1965 |
| Incident Location | [Unknown] |
| Incident Attribute | [Not applicable] |
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.
Citation:
Obituary of John Caplis, Chicago Tribune, April 24, 1965.