Derrick McReary
Derrick wants federal witness Aiden O'Malley dead before he testifies. Niko intercepts the prison transport convoy in the Booth Tunnel and finishes O'Malley before backup arrives.
Tunnel of Death is a mission in Grand Theft Auto IV given to protagonist Niko Bellic by Irish gangster Derrick McReary from the public park in Acter, Alderney.
Derrick is high on cocaine when Niko arrives. He tells Niko that he heard Aiden O'Malley is being transported from the Varsity Heights Police Station to the Alderney State Correctional Facility, and since Aiden has the impression that Derrick is the reason why he's incarcerated, he chooses to rat him out. Therefore, Derrick decides that this is a good opportunity to get rid of him.
Soon, Packie calls Niko on the details. Aiden is heavily guarded by a LCPD escort. He left a Biff with an RPG behind the Tinkle Building in Alderney City. He wants Niko to use the truck to block one end of the Booth Tunnel while Packie blocks the other end.
Niko calls Packie once he is in the truck. Packie explains that they cannot kill Aiden on the spot because the police will go straight to Derrick, so they must make it look like a prison break.
Niko then blocks the tunnel and stops the convoy and Packie comes from the rear and blocks that way. One of the policemen gets out and asks Niko to move the truck. Niko and Packie launch a surprise attack on the convoy and eliminate all the cops. Then, Niko and Packie steal the Police Stockade containing Aiden. .]] Niko drives the truck to Port Tudor to abandon it as he escapes the police. Niko, Packie, and Aiden change transport to a nearby parked Presidente and drive to the cliffs in Leftwood.
Aiden is delighted that he is free from police custody and asks who sent them to rescue him. Niko and Packie do not reveal who until they arrive at the cliffs.
Once there, Packie reveals that his elder brother Derrick sent them to free Aiden so that Niko can kill him. Aiden is shocked and says that Derrick has always been the rat. Packie leaves, then Niko shoots Aiden who then falls into the water as blood gushes on the ocean. Niko then calls Derrick to tell him Aiden is dead.
