Jigsaw (James Carpinello)

John Saint was the son of Livia Saint and Howard Saint, and the identical twin brother of Bobby Saint. John was one of the participants that headed to Puerto Rico to assassinate Frank Castle and his family. During Castle's ambush on Howard's casino, Saints & Sinners, John was trapped under fallen debris. Castle found him and put an eight-pound, trip-wire activated grenade in his hand. John was apparently killed when his arm gave out, causing the grenade to detonate.