McCluskey is a corrupt Irish-American police captain who is on the payrolls of both Virgil Sollozzo and the Tattaglias. McCluskey first appears in the novel after Michael calls the police to report the loss of guard detail over Don Vito Corleone, who lies unprotected in the hospital after Sollozzo’s hitmen shoot him. McCluskey arrives on the scene and confronts Michael, who accuses the captain of removing the guards. McCluskey responds by punching Michael in the face, breaking his jaw. A long-time member of the New York City Police Department, whose father was a police sergeant, McCluskey resents his low pay and sees nothing wrong with engaging in “clean graft” so that his kids can attend good colleges. He is an old friend of Bruno Tattaglia through their sons’ university classes and agrees to protect the Tattaglia Family’s drug operations with Sollozzo in exchange for a hefty, ongoing bribe. McCluskey’s association with Sollozzo, however, proves to be his downfall when Michael murders both him and Sollozzo at the Luna Azure Restaurant.