Homicide Detective, recently transfered from Undercover Narcotics
D.J. Cotrona grew up in Connecticut and went to college at Northeastern University in Boston. While there, he took theatre classes for fun, which led to a spot on an episode of Law & Order Special Victims Unit.
For his first TV series, Skin, Cotrona moved to Los Angeles, and since then has worked in projects including Windfall, Hollywood Division, as well as the feature film Dear John.
This guy's smart, likeable, but also a little cocky. Hey, nobody's perfect, right? Stone has a solid street sense, cultivated from his years as an undercover Narc. He's had a lot of close calls and knows how to handle himself in a dangerous situation. We're thinking he's a good guy to have around when things go south.
Stone is familiar with people who go down the wrong path since he used to be one. Using his past to connect with suspects during interrogations is a gift appreciated in homicide. Stone is full of charm, but to gain trust and respect from his colleagues, he must first grasp the concept of teamwork. He also needs to get used to wearing a tie.
In episode 15 his ex-girlfriend from his days working undercover narcotics comes back into his life having been beaten up. She tells him there are guys after her and that they got her licenese and know where she lives. Detective Stone takes her in to his home. When he learns in episode 16 that she was beaten up for stealing a kilogram of heroin he tells her he is is done with her. All the while there is a bounty out on Detective Stone from some big players in the drug world. Desperate to get the money to pay her debt for the heroin and not knowing that Detective Stone and the FBI have in custody the drug lords who put out the bounty Detective Stone is killed by his ex-girlfriend for the money. Detective Stone's partner and current girlfriend hears the shots and she kills the ex and holds John as he dies.