sentences:  Examining the facts again, McCaleb realizes that the distinctive attribute of the "Code Killer" was that the nine-digit identifying code did not include a one, and that "Noone" ("no one") is actually the Code Killer.By following the contact information on Noone, McCaleb and Jaye Winston find the Code Killer's files, which prove that he had deliberately killed three people to get McCaleb a new heart.Although McCaleb is thus cleared, the fact that Gloria's death was directly due to his illness creates a rift in his increasingly personal relationship with Graciela and her nephew Raymond, Gloria's son.