Devil to Pay — John Carson

A twisted killer, playing a vicious game. And only he knows the rules...Twenty years ago, DCI Willie Dowd retired on a high, having stopped an elusive serial killer. Dowd killed Colin Harris in self-defense. Case closed.Now, DCI Harry McNeil comes across evidence that suggests that maybe Harris wasn't guilty after all.Willie Dowd is in a home now, suffering from Dementia. He doesn't know his family members at times, and certainly can't remember Colin Harris.As Harry leads his team investigating the brutal murder of two women, he finds a link between them and the previous victims from Willie Dowd's time.Harry is a pawn in a game he doesn't know he's playing. He doesn't know the rules yet. But he's going to find out. And by then, it will be game over...