John Aloysius Corey (born 1955) is a fictitious recurring character in Nelson DeMille novels. He is quick-witted and cocky, but would be considered by most to be a brilliant detective.
Corey first appeared in DeMille's novel Plum Island. Since then, he's appeared in The Lion's Game, Night Fall, Wild Fire, and most recently, The Lion.
The character has a healthy disrespect for authority, a dry and engaging wit, and frequently crosses the powers that be. His outside persona is one of bemused detachment, however once he locks in on a problem, he's a merciless powerhouse who refuses to stop until he's solved his case.
In Plum Island, Corey is a New York homicide detective, on medical leave, and a lecturer at John Jay. In The Lion's Game, Corey has left the NYPD and become an agent for the fictional FBI Anti-Terrorist Task Force (ATTF) in New York. The ATTF is based on the real-life Joint Terrorist Task Force.
While the Plum Island case is a local matter, the three succeeding novels deal with international conspiracy and terrorism, as befits his change in occupation. Corey both meets and works with Kate Mayfield in the Anti-Terrorist Task Force, a fact which involves them both working on cases and getting into trouble together.
Before Plum Island, Corey is shot by two Hispanic criminals of unknown origin, which is the initial set up of the novel. In The Lion's Game, he is also pursued and shot by the Libyan terrorist Asad Khalil.
In the latest novel, The Lion, Corey once again faces the Lion, Asad Khalil.
When Corey is first introduced in Plum Island, he is separated and eventually divorced from his first wife, defense attorney Robin Paine, who does not appear in the novels. The ostensible reason for the separation is due to a change in her career; she had stopped working on Corey's side of the law, as a Manhattan assistant district attorney, and had become a high-paid defense attorney for the criminals he was trying to "put in the slammer".
In Plum Island, he becomes romantically involved with two characters he meets in the course of his investigation:
Corey's involvement with Penrose continues in The Lion's Game, where he meets and later marries FBI agent Kate Mayfield.