Dexter (episode)
Dexter is contacted by his foster sister Debra (Jennifer Carpenter), a vice officer in the Miami Metro Police Department. Dexter, a blood spatter analyst for the department, assists Debra in investigating an apparent serial killer targeting prostitutes. Dexter examines the latest victim and is shocked to find no trace of blood on the dismembered corpse. At the police station, Dexter discusses another murder case being handled by James Doakes (Erik King), a detective who dislikes him. Later, Dexter watches Jamie Jaworski, a murderer who escaped justice due to a faulty warrant, and breaks into his home to find evidence. Once he confirms that Jaworski is guilty, Dexter meets with his girlfriend Rita Bennett (Julie Benz), a former victim of domestic abuse victim; Rita has two young children, Astor and Cody. While on a date with Rita, Dexter finds another murder scene with no traces of blood, this time with the victim's head missing. Dexter theorizes that the killer murders his victims in extreme cold, explaining the absence of blood, and might be using a stolen refrigerated truck. Dexter allows Debra to pitch the theory, but their superior officer, Lt. María LaGuerta (Lauren Vélez), dismisses it.
List of Dexter characters
Unable to accept the reality of her husband being a veteran serial killer, Sally begins blaming her children for the loss of their lives, hoping Arthur returns to "whisk her away". The blame shifting impacts Rebecca significantly, leading to her suicide, which in turn leads to Jonah beating his mother to death in retribution. Blood-splatter indicates that the murderer was someone of Trinity's height, making people believe that Trinity had found killed them, when in reality Jonah killed his mother standing on the stairs at the same height as his father was.Jonah Mitchell is the son and oldest child of Arthur and Sally. He is a member of JROTC, plays football and at one time played baseball for his high school, which he quit; angering his father greatly. Though at first they seem to have a great father/son relationship, it is soon revealed that his father is very domineering on him and physically abusive, going as far as to break his fingers for damaging Arthur's car (a white 1968 GT-500 Shelby Mustang convertible with a blue racing stripe). Jonah tells Dexter he always comes up with excuses to explain the injuries given by his father to the school, but due to the number of injuries, is running out of excuses. He later snaps during Thanksgiving dinner and destroys his father's awards as well as smashing Arthur's sister's urn, causing him to nearly kill Jonah by strangulation but he is saved by Dexter. When Dexter is trying to find a child Arthur kidnapped, Jonah goes on Arthur's computer, discovering his father had been looking up vacant houses (although he does not know Arthur's intent for doing so). In the season 4 finale, he is seen being taken out of his home by the police when they uncover that Arthur is Trinity.