After eliminating the Dogs of Hell and the Mexican Cartel, Castle returned to New York so he could track down and kill mobster Mickey O'Hare, who was the last surviving member of the Kitchen Irish.
Castle tracked O'Hare to JFK International Airport and found the mobster in one of the men's restrooms, where he had locked himself in a stall and called a contact from his cell phone. O'Hare, who was unaware of Castle's presence, told the contact he had booked a flight to Dublin, Ireland and would soon be boarding.
At that moment, Castle burst into the stall and attacked O'Hare, who tried to persuade the vigilante into thinking that he had killed everyone he needed to kill. Castle, however, was unmoved by the mobster's pleas, even when O'Hare mentioned that he himself had a family.
When two men entered the restroom, Castle began to strangle O'Hare with his tie. The moment the two men left, disgusted by what they perceived were two men engaging in intercourse, Castle, who by this time had strangled O'Hare to death, left the mobster's corpse in the stall and proceeded to leave the restroom.
Convinced that he had avenged his wife and children, Castle destroyed his Bulletproof Vest and abandoned his former life, taking on the alias "Pete Castiglione".
- Mickey O'Hare's death is a reference to Punisher Vol. 7 #42 where William Rawlins was killed by the Punisher in the bathroom of the Kabul International airport.