If done so, he will still go to the tower but he will not talk on the radio, and there will be no way of knowing about his plans to destroy the monorail until speaking to Hsu after confronting Curtis (or pickpocketing the codes). IMPORTANT: Do not inform Curtis about this lead if one wants to save the monorail. She will say that there have been break-ins at the control tower every night. Speaking to Boyd will complete this part of the quest. Contreras will refer the player character to Boyd but Sterling will provide valuable information about the spy. Map markers will send the player character to Corporal Sterling, Contreras, and Boyd to ask around about suspicious activity.
He will then ask the player character to speak to Carrie Boyd or Contreras (Although he says that Contreras is not 'above' suspicion). At some point, or upon asking James Hsu about problems at Camp McCarran, the Courier will be asked to speak with Captain Ronald Curtis, who is located on the ground floor of the Camp McCarran terminal building to the west of the escalators.
