S6-10 Guest Characters>> Detective Stevenson (James Weber Brown) 7.32 (324) | 2004 Leading the investigation into Marcel Sabatier’s death. Persuades Stuart to go into witness protection, firstly for his own safety from the Sheik's men who killed Marcel, and also to give them a better chance of convicting those responsible. Tells Stuart they would advise no further contact with Ryan after he goes.