The Detective Is Dead (Harpur & Iles Mysteries, 12) (Book 12)

No one, including Detective Chief Superintendent Harpur, is willing to testify at the murder trial of three crooks in the drug trade, so the killers go free. Meanwhile, would-be drug kingpin Keith Vine is playing a dangerous double game as an informant—a game that could help the police trap the drug lords but will probably cost Vine his life.