The dead won't tell / S.K. Waters.

"When Abbie Adams, a historian-turned-journalist, is hired to investigate a cold-case murder from 1969, she jumps at the chance. But soon after she begins researching the case, she realizes that Frank Wexler, the faculty advisor who tanked her thesis and a member of a powerful family in town, is connected to the crime and is definitely not talking. As Abbie tracks down the remaining living witnesses, she slowly pieces together the events of that fateful night, and yet is not a single step closer to solving the case. Were the police back then told to stand down? To cover up the crime? When her witnesses suddenly wind up dead, it becomes clear that Abbie has stumbled upon a sensitive truth that threatens to tear the fabric of the southern town apart. The killer could still be out there, and now he could be hunting her" --