Kill Switch (Devil's Night Book 3)

Details: Sending him to prison was the worst thing I could've done. It didn't matter that he did the crime or that I wished he was dead. Perhaps I thought I'd have time to disappear before he got out or he'd cool off in jail and be anything but the horror he was. But I was wrong. Three years came and went too fast, and now he's anything but calm. Prison only gave him time to plan.