The Madman's Tale — John Katzenbach

It's been twenty years since Western State Hospital was closed down. Francis Petrel was barely out of his teens when his family committed him to the asylum for his erratic behavior. Now middle-aged, he leads an aimless life, perpetually medicated to quiet the chorus of voices in his head. But a reunion on the grounds of the shuttered institution stirs something deep in Francis's troubled mind: dark memories about the unsolved murder of a young nurse whose mutilated corpse was discovered late one night after lights-out. Who was her murderer? Now, like Francis's long-buried recollections, the killer has resurfaced . . . with a vengeance.