Turning Angel by Greg Iles

The second book in a set featuring the fictional character Penn Cage. After winning the most notorious case of his career, Penn Cage decides to stay in his hometown of Natchez, Mississippi to raise his daughter. As the news of the death of a prominent and promising senior from the prep school spreads through the city, Penn's close friend Drew Elliott seeks Penn's counsel. After a shocking confession by Drew, Penn finds himself investigating the secrets lives of local prep school students. In a town overlooked by the Turning Angel in the local cemetery, Penn puts himself in danger to exonerate Drew and find the real killer.