He was a Fashion and S&M photographer who was suspected of murder.
Farrow was arrested on suspicion of rape in New York in 2002. The charges were ultimately dropped (according to the lead investigator of the case, the victim was most likely paid off).
His pictures were typically graphic, bordering on grotesque. Among the ones seen was a woman eating her own intestines like noodles using chopsticks. They sometimes featured women who had really been abused by him.
Farrow first appears on Dexter's radar when the severed arm of one of his models, Estrella Carazo, was found inside an alligator by Joe Nix. When he is questioned, Farrow flirts with Debra,saying that he would rip her clothes off and rough her up for a photo. This causes Dexter to make him a higher priority than Arthur "Trinity" Mitchell.
Dexter breaks into Farrow's studio and finds evidence (blood and a fingernail) that Carazo had been beaten there. Dexter then decides to snatch Farrow from a nightclub, but has to change his plan when Joey Quinn appears there. Dexter sends a woman to distract Quinn and he slips away. Quinn is annoyed that a "lab geek" ditched him.
Dexter secretly leaves a camping trip during the night and abducts Farrow from his home by garroting him until he is unconscious. He takes him into his studio, which is in the same building.
Farrow insists that he hadn't killed anyone and that he only beat the women he photographed to create a kind of artistic contrast between beauty and the ugliness in the world. Despite this, Dexter kills him using a meat cleaver, dismembers him, and dumps his remains into the Gulf Stream. He then returns to the camping site.
The next day at work, Dexter learns that Angel Batista arrested Farrow's assistant, Timothy Brand, for the murder of Carazo on air-tight evidence such as surveillance photos and DNA. In spite of Farrow's despicable personality, Dexter feels remorse for killing him as Farrow didn't meet The Code.
Dexter breaks Farrow's blood slide and later tells Arthur Mitchell that he killed a man in a "hunting accident."
- If we look closer at Farrow's case it is still a question whether he was aware of Brand's killing spree or not. It is possible that he participated in rape/abuse like Alex Tilden (who also was an accomplice to murder and rapist).
- He is the second character to be killed out of the Code while being a pedophile and a photographer, the first one being Nathan Marten. Both of them are also similar to a character from the novel Dearly Devoted Dexter, Steve Reiker (also a photographer and a rapist) but Farrow seems to be more directly based on Reiker.
- Apart of Reiker, Farrow is also similar to Novel character Alex Doncevic: both of them were alleged murderers who turned out to be innocent, though their personality and art were very disturbing and psychotic. Both also had their lawyers get them free of charges and both were framed by their associates. It should be noted that despite Farrow seeming to be at least partially based on Doncevic, the gap between novel and filming of Season Four is too small to say for sure.