Dexter Morgan is a vigilante serial killer that believes that murdering those who are killers would bring justice. The methods he uses are outside of the law. He would start by using an scalp to cut the victim and extract a little drop of blood and putting it in a glass slide.
Dexter is a forensic blood spatter analyst who works for the fictitious Miami Metro Police Department. He uses the resources of the department to his benefit, using the databases for background checks of his next victims. The way into the department is through the elevator of the building and the majority of the times he would smile while exiting the elevator.
Rita’s murder signified the most prominent moment where Dexter’s crimes started affecting not just his life, but the lives of those he loves.
While murdering Hannah father, Dexter’s realizes that he is his own Dark Passenger. Dexter embraces his Dark Passenger and no longer uses Harry’s code.
Dexter’s experiences his last kill, the cruelest and perhapsmost gruesome of them all. He had to kill Deb but it was a mercy killing. During a storm, Dexter speeds off with Deb’s body, wrapped in a white hospital sheet and dumps it to the see where he’s dumped untold corpses.
Dexter feels he has to protect his own family from him, thus he abandons Hannah and his son and stars a new life full of regret in a region somewhere around the Pacific Northwest with a new job, lumberjacking.