
In the narrative, we delve deeper as Brian recounts his backstory to Dr. Paul Petrie, who will later become his first victim. Following his departure from the Morgans, Brian’s aggressive tendencies surface at every new residence he is assigned. His life takes a turn at Harbor Light Mental Hospital, where he is diagnosed with Antisocial Personality Disorder and some professionals even label him as a psychopath. It’s challenging to conceive of an alternative fate for Brian, given his history of animal mutilation that predates the traumatic experiences he attributes to his transformation into a serial killer. As an adult and after being discharged from the hospital, Brian seems to have found tranquility. Petrie is taken aback by this, but Brian’s relentless pursuit of reconnecting with Dexter raises concerns. If Brian continues to press, Petrie warns, he will be forced back to Harbor Light. This threat, though ambiguous, provides enough motivation for Brian to act aggressively, ultimately leading to the brutal assault and murder of Petrie using a fire poker. The series Original Sin dedicates significant screen time to Brian’s origin story, which may feel like a misleading tactic in some eyes, but personal opinions on this matter may differ.