Colby

Colby is a friend of Deran Cody's a member of his gang.

Season 3
After Smurf goes to prison, Colby and Ox are a part of Deran Cody's gang, pulling risky jobs together. However, Colby becomes dissatisfied when Deran begins pulling away from them.

Deran eventually gives Colby an easy job, but Colby chooses not to wait for Deran or nightfall. As a result, instead of facing a guard dog, they face a security guard who shoots Ox in the gut. Colby takes Ox to Deran's bar for help which Deran, enraged by Colby's recklessness, reluctantly gives as he knows that Colby and Ox will turn him into the police if they get caught. Deran's boyfriend Linc patches up Ox and Deran sends Colby and Ox to a doctor in Mexico for treatment. Deran threatens bodily harm to Colby if he ever sees his former friend again.

After discovering that Ox is missing from Ox's parole officer, Deran visits Colby who reveals that Ox is dead, the doctor having been unable to save him. Colby ended up spending two weeks with Ox in a shit motel room before Ox died and Colby was unable to bring himself to reveal the truth to Ox's mother who simply thinks that her son is just missing. Colby blames Deran for Ox's death, stating that Deran is just as responsible as Colby for it.

Season 4
After Jack Muntean gets taken down by the DEA with Adrian's help, Colby correctly deduces that Adrian was working with the cops and he blackmails Deran for $20,000. In order to protect his boyfriend, Deran shoots Colby in the head, frames him to Pope as the one who was talking to the cops and buries Colby's body in the desert. Deran subsequently experiences guilt and remorse over murdering Colby, having never actually killed someone before.