Forty years after Emily Vaughn was murdered on her prom night, U.S. Marshal Andrea Oliver picks up the cold case to find justice. Who killed Emily Vaughn? The stunning new standalone thriller from international No. 1 bestseller Karin Slaughter. A girl with a secret ... Longbill Beach, 1982. Emily Vaughn gets ready for prom night, the highlight of any high school experience. But Emily has a secret. And by the end of the evening, she will be dead....