What the Night Knows (2010)
After Detective John Calvino receives a signed confesion to a shocking crime from 14-year-old Billy Lucas, he feels that somehow Billy has come home with him, to his family. Then another killing spree happens, just as and when John Calvino dreaded it would. Billy is safely locked away, but not the "ghost", if the ghost exists, that links these murders with past crimes, and with John Calvino. Anything could happen, and surely will-- again.