| Name | Martin Costello |
| Agency | Chicago Fire Department |
| Rank | Lieutenant |
| Type of Firefighter | Career |
| Age Range | [Unknown] |
| Sex | Male |
| Date of Birth | 0/0/0 |
| Date of Death | 10/27/1971 |
| Cause of Death | Stress/Overexertion |
| Nature of Death | Heart attack |
| Attribute of Death | [not applicable] |
| Type of Duty | Firefighting operations |
On October 27, 1971, Chicago Fire Department Lieutenant Martin Costello died in the line of duty after suffering a heart attack while performing firefighting operations at 420 N. Hoyne.