Doakes was a strong-willed sergeant within Miami Metro Homicide. He acted as both a detective and a supervisor at any given crime scene. Prior to joining Miami Metro, Doakes was employed as an Operative in the United States Army Rangers. The Rangers are a Special Operations unit in the Army that handles sensitive assignments. Sergeant Doakes' keen instinct could pinpoint trouble and see the dark side of people. He was the only one who believed that Dexter Morgan had dangerous side.