sister of Dexter and biological child of Harry Morgan. Debra believed that she truly knew her father, but is unaware of the secrets he kept, especially concerning Dexter (whom she sees as a true brother). Inspired by their father's legendary police career, Debra joined the police and desperately yearned to become a homicide detective. Initially assigned to Vice, she was transferred to Homicide at the start of the first season. Being new to the job and very insecure, she largely relied on Dexter's expertise on murderers to solve difficult cases. Debra met Rudy Cooper, who unknown to her is the Ice Truck Killer using her to get close to Dexter. She falls in love with him, but is later kidnapped by him in order to be able to reveal himself to Dexter. She is bound to a table in the same manner that Dexter kills his victims, while Dexter and Brian discuss her fate. In the show, she is unconscious, but in Darkly Dreaming Dexter, she is awake and finds out that her brother is a killer. Debra is severely affected by Rudy's betrayal; she moves in with Dexter for fear of being alone. Throughout the second season, Debra stays in her brother's apartment as she deals with the trauma of what happened, but leaves his apartment in a mess. Debra is a key member of the police task force in charge of finding the Bay Harbor Butcher, who is secretly Dexter. She falls for an older man, Frank Lundy, the FBI agent in charge of the case, all the while improving her ability on the job. By the end of Season 2, Debra has recovered from the trauma of the Ice Truck Killer, and is confident as an officer and determined to get her detective's shield. In Season 3, Debra has had her hair cut to shoulder length, has "sworn off men, liquor and smokes" and is even more determined to get her silver detective's shield. She is working with a new partner, Detective Quinn, but has been approached by an Internal Affairs officer who tells her that her partner is being investigated as a dirty cop, but she refuses to help them. She was originally part of the team investigating the murder of Miguel Prado's brother, Oscar, but because of her lack of tact and people skills she was removed from the case by newly promoted Angel Batista;