Brian Moser

Verified Timeline

Lore & Background

Brian was born to Laura Moser and Joseph Driscoll on July 17, 1968. His mother gave birth to a second son, Dexter, on February 1, 1971. They grew up with their mother, estranged from their father, at 1235 Mangrove Drive in Miami, Florida. Brian was very fond and protective of his brother and he would care for him. On October 3, 1973, four people, including Laura, were found dismembered via chainsaw inside a cargo container at the Port of Miami. Brian and Dexter were present and witnessed their mother being butchered, altering their psyche and shaping them into future killers. Dexter was taken by the Morgan family but Brian was too damaged and was transferred to a psychiatric facility in Tampa. As a kid, Brian showed signs of psychopathy, such as killing small animals and showing little emotion to others. Brian was at first taken in with the Morgan family, along with Dexter, but, after attempting to smother their daughter, Debra, and lashing out often, he was deemed too traumatised and taken away. After being sent to and kicked out of various foster homes, he was sent to Harbor Light Mental Hospital, where he was diagnosed with antisocial personality disorder. Due to seeing his mother being dismembered in front of him, Brian developed an amputee fetish. After eventually stealing the alias, Rudy Cooper, he began working as a prosthetist. According to Brian, his mother lost both her legs in a car accident, and by becoming a doctor he could overcome the feeling of inability of not having been able to help her. Brian is shown to be capable of masking his true identity, even more so than Dexter, to the point that Debra Morgan begins a romantic relationship with him. Unbeknownst to her, he was only using her to get closer to Dexter and never felt any real emotion towards her.

In Their Own Story

Prior to the events of season one, Brian's victims were people who he believed had wronged him in life, such as multiple foster kids who abused him during his stints at their homes. During the first season, Brian mainly killed sex workers. Brian deviated slightly from his pattern during season one, when he killed his father and attempted to kill Angel Batista. Brian usually roamed at night to scour for victims and find a hooker, eventually inviting them to his apartment. When he killed his father and the neighbor, he pretended to be a cable repairman and was able to enter their homes without suspicion. When his victims arrived at his apartment, Brian would engage in sexual activities with them before putting them in a chokehold to render them unconscious. Brian would strap his victims to a motorized table, located in a custom refrigeration unit inside his apartment. He would use the table to hoist the victim upside-down, then severing their jugular, having them bleed out, and collecting the blood in a bucket. It is revealed that he was hoarding the blood of his victims to use it at a later date in order to stage a blood-soaked crime scene to trigger a traumatic memory of Dexter's. Brian also used methods of suffocation, use of a firearm and insulin injection to kill other victims. Brian would use surgical tools, such as electrically powered saws, to dismember the victim. He would separate the body into several parts and wrap them in brown paper. He would transport the body parts using a large refrigerated truck, later earning him the moniker 'Ice Truck Killer', and take them to specific places. Brian would display the bodies in public, laid out from head to toe.

Reader's Guide

In season one, three dismembered bodies are found dissected in the same manner, leading to Miami Metro Police suspecting a serial killer. Dexter proposes the idea that the killer is using a refrigerated vehicle to transport the body parts and encounters one while driving. When Dexter returns to his apartment, he finds the head of a toy doll. He sees this as the killer inviting him to play and accepts it. Later, Debra tells Dexter she has found a refrigerated truck with human fingertips inside, painted the same as the doll's. After Dexter arrives home, he learns that the Ice Truck Killer has been in his house again. When a fourth victim is discovered at an ice hockey arena, CCTV footage shows security guard Tony Tucci leaving the body parts. Originally thought to be the killer, Tucci's severed hand is found on a beach. Various clues leads Dexter to an abandoned hospital, where he finds Tucci strapped to an operating table. Tucci is later treated by a prosthetist named Rudy Cooper. Debra suggests blindfolding Tucci to gain more insight. When he states that the person who took him captive often used throat lozenges, they find a wrapper and identify a partial fingerprint from it. Dexter kills a couple that were engaged in smuggling immigrants at a car salvage yard. Later, he is called to the salvage yard's crime scene, where he finds the wife lying in the trailer he killed them in. He deduces that the Ice Truck Killer retrieved the body from the ocean. He notices a smiley face etched into one of his blood slides, realising that the killer is not trying to expose him. After Neil Perry is exposed as the killer, Dexter is sad that his friend will be gone. However, after an exchange with Perry, Dexter realizes he is not the real killer. Debra begins dating Rudy. Perry is questioned by Maria LaGuerta and reveals that he pretended to be the killer for attention. Dexter keeps in touch with the killer by sending a message through Craigslist. Rudy opens Craigslist and responds to Dexter's message, revealing him to be the Ice Truck Killer. Dexter learns that his biological father, Joseph Driscoll, has died, leaving his belongings to him. Dexter travels to the house with his girlfriend Rita, and Debra and Rudy help. Driscoll's neighbor, Irma Holt, recognises Rudy as the cable repairman, who last visited Driscoll. Later after the others leave Driscoll's house, Rudy returns as the cable repairman to discreetly kill Holt. Dexter is called to a crime scene at a hotel room and sees the entire room soaked in blood, triggering a repressed memory. Debra proposes that it is the work of the Ice Truck Killer. Angel Batista speaks to a prostitute, who has a prosthetic hand with fingernails with similar paint of the Ice Truck Killer. Theorizing that the killer is an acrotomophiliac, he speaks to Rudy, who later attacks him in a parking lot but is elbowed in the face, causing a cut lip. He tracks down the prostitute and kills her. Dexter finds out that he is connected to the Ice Truck Killer involving his mother's murder from 1973. Rudy convinces Debra to join him on his boat, proposing to her, but strangles her unconscious. Dexter finds out Rudy is the killer after linking the cut on his lip to the blood on Batista's collar. Dexter finds a clue that leads him to his childhood home, and has flashbacks revealing that Rudy, whose real name is Brian Moser, is Dexter's biological brother. He reveals to him that they both witnessed their mother's murder, but while Dexter repressed the memory, Brian didn't and was instead put into a mental hospital. Brian talks to Dexter inside their childhood home and tries to persuade Dexter to kill Debra with him, so he can be 'free', but Dexter stops him. Police arrive and Brian escapes through a trap door. At night, Debra appears to be sleeping in Dexter's bed. Brian breaks in and tries...

Did You Know?

• Brian Moser was born on July 17, 1968, and his brother Dexter was born on February 1, 1971.
• Brian was diagnosed with antisocial personality disorder at Harbor Light Mental Hospital.
• Brian developed an amputee fetish due to witnessing his mother being dismembered in front of him.
• Brian used the alias 'Rudy Cooper' and worked as a prosthetist.
• Brian was portrayed by Christian Camargo in the original series and by Roby Attal in the 2024 prequel Dexter: Original Sin.