Who is Detective Samuelson from A Savage Place: A Spenser Novel and what is their importance?

Detective Samuelson is the homicide detective who investigates both Mickey Rafferty's and Felton's murder. At first, Candy makes the decision to lie to Samuelson about Mickey's role in the movie industry corruption story. However, after Spenser kills Franco's assistant in Felton's house, Spencer insists they be truthful with Samuelson. Samuelson is not happy about the lies but agrees to allow Spenser to go along when they discover Felton's body. Samuelson and Spenser discuss Felton's murder and bounce theories off each other. Later, Spenser keeps in touch with Samuelson, happy for the help despite Candy's reluctance to trust the police. Spenser and Samuelson become tentative friends, and Samuelson ends up cutting Spenser loose when he is accused of kidnapping and assaulting Brewster and Simms.