History: (Batman I #318) - A career soldier and demolitions expert, Joseph Rigger returned to his home of Gotham City when his entire family was killed in separate building-related accidents over a three-week span. His sister was poisoned by lead paint, his father fell through a rotted stairway, and his mother had a heart attack in a stalled elevator. His sanity was severely affected, and he blamed the buildings themselves for his families’ death. He vowed that those buildings would never kill again, and designed a costume to become the Firebug, setting out to burn those buildings to the ground. He burned two of the buildings to the ground, alerting the fire department beforehand so no one would perish in the blazes. He set a fire-bomb in the Gotham State Building, but Batman had deduced both his identity and final target and disarmed the bomb. Batman confronted him atop the building, and Firebug reacted by deactivating his costume’s safety features and setting himself on fire. In the ensuing battle Firebug fell from the building and his costume exploded.

(Hero Hotline #5) - Firebug miraculously survived, and was seen years later when the Calculator hired him to kill the leader of Hero Hotline. He was beaten and sent off to prison.