Y is for yesterday (Kinsey Millhone Alphabet series)

The darkest and most disturbing case report from the files of Kinsey Millhone, Y is for Yesterday, begins in 1979, when four teenage boys from an elite private school sexually assault a fourteen-year-old classmate - and film the attack. Not long after, the tape goes missing and the suspected thief, a fellow pupil, is murdered. In the investigation that follows, one boy turns in evidence for the state and two of his peers are convicted. But the ringleader escapes without a trace.

Now, it's 1989 and one of the perpetrators, Fritz McCabe, has been released from prison. Moody, unrepentant, and angry, he is a virtual prisoner of his ever-watchful parents - until a copy of the missing tape arrives with a ransom demand. That's when the McCabes call Private Investigator Kinsey Millhone for help. As she is drawn into their family drama, she keeps a watchful eye on Fritz. But he's not the only one being haunted by the past . . .
'Kinsey Millhone is up there with the giants of the private-eye genre . . . Exhilarating' Times Literary Supplement
'Sue Grafton knows what she's doing . . . Her clever but unpretentious mysteries reassure us that no life is insignificant, no death inconsequential' New York Times
'Brilliant . . . Heaven knows what we'll do when Grafton gets to Z' Daily Mail