Detective Booker is a character in the Showtime series DEXTER.
He is one of many homicide detectives working in the Miami Metro Homicide Department. He is assigned to FBI Agent Frank Lundy's Task Force in an attempt to find out the identity of The Bay Harbor Butcher.
Although he is not officially announced, it is assumed that he, along with several others, were added later to investigate the victim's past.
He's identified via a blackboard in the background, being assigned to an unknown victim numbered 17.