Long Time Gone by J.A. Jance

An eyewitness to a fifty-year-old murder has just come forward, and Beau has been hand-picked to lead the investigation. While undergoing hypnotherapy, a middle-aged nun unexpectedly recalls the grisly details of a cold-blooded killing she witnessed when she was five years old. Though fear has kept these memories repressed for half a century, they've now risen to the surface to cast a harsh light on a deadly plot that spans two generations. And Beau's caught in the glare, facing a ruthless band of coconspirators willing to go to any lengths to keep their secrets hidden.