Indelible - Karin Slaughter

When medical examiner Sara Linton and police chief Jeffrey Tolliver take a trip away from the small town of Heartsdale - an escape from all the pressures which complicate their relationship - it should be a straightforward weekend at the beach. But they decide to take a detour via Jeffrey's hometown and things go violently wrong when Jeffrey's best friend Robert shoots dead an intruder who breaks into his house. Jeffrey and Sara are first on the scene and Jeffrey's keen to clear his friend's name, but for Sara things aren't so simple. The sear marks around the bullet-hole don't tally with Robert's story. Robert's wife, Jessie, is incoherent and confused. And when Jeffrey appears to change the crime scene, Sara no longer knows who to trust. Twelve years later, Sara and Jeffrey are caught up in a shockingly brutal attack which threatens to destroy both their lives. But they're not random victims. They've been targeted. And it seems the past is catching up with both of them...