|Agency||Chicago Fire Department|
|Type of Firefighter||Career|
|Date of Birth||0/0/0|
|Date of Death||9/6/1959|
|Cause of Death||Stress/Overexertion|
|Nature of Death||Heart attack|
|Attribute of Death||[not applicable]|
|Type of Duty||Firehouse duties|
On September 6, 1959, Chicago Fire Department Firefighter John Pfeiffer died in the line of duty after suffering a heart attack in company quarters at 1403 South Michigan Avenue.
Pfeiffer became a member of the Chicago Fire Department on November 1, 1943.