The disappearance of Stephanie Mailer by Joël Dicker
In 1994, the town of Orphea reels from the discovery of four murders. Officers Rosenberg and Scott crack the case and identify the killer. Then, twenty years later, Rosenberg is approached by Stephanie Mailer, a journalist who believes he made a mistake back in 1994 and that the real murderer is still out there. But before she can give any more details, Stephanie Mailer mysteriously disappears, and Rosenberg and Scott are forced to confront the possibility that her suspicions might have been proved true.