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.
Sinister Dexter
Stories from now on generally revolve around them protecting her empire, though occasionally they also take contracts from other people. During this time Demi's younger sister, Billi Octavo, decides to become a Gunshark, but a misunderstanding results in her killing some respected city dignitaries. During the ensuing police chase Sinister explains the unwritten "Gunshark Code" that they never kill cops or "innocents". Later Billi hacks into the police database and finds the dignitaries she killed were actually guilty of "perverted" crimes and it had been covered up. She released this data to the media and the police were forced to abandon the hunt. It is also revealed most rank-and-file police officers actually support Gunsharks, because they only kill other criminals which results in less criminals overall.