A Narrow Margin of Error

Ex-DI Hilary Green, now working as a civilian consultant to her former Thames Valley bosses, is happy to be handed another cold case murder file. Who killed a young Oxford student at his digs over ten years ago, and why? It doesn't take her long to discover that the young man in question was something of a sexual athlete, and suspects aren't exactly in short supply, and soon she's concentrating her investigation on those he bedded and discarded. But tracking down a killer isn't her only problem.