After his son was killed, Microchip began working with the Punisher. But after working together for ten years, Microchip was presumed dead after having a falling out with his once friend and partner. however, he was later revealed to be still alive and aiding a CIA black ops unit in hunting the Punisher down for assistance in finding and eliminating terrorists, such as Osama bin Laden. But Castle adamantly declined, as he prefered his autonomy to indentured service to an institution such as the government.
