|Agency||Chicago Fire Department|
|Type of Firefighter||Career|
|Age Range||51 to 55|
|Date of Birth||0/0/0|
|Date of Death||6/27/1963|
|Cause of Death||Stress/Overexertion|
|Nature of Death||Heart attack|
|Attribute of Death||[not applicable]|
|Type of Duty||[Unknown]|
On June 27, 1963, John Callahan, an engineer at the Chicago Fire Department maintenance plant, suffered a heart attack while on duty. Callahan was taken to St. Ann’s Hospital where he passed away.
Obituary of John Callahan, Chicago Daily Tribune, June 29, 1963.