When 10-year-old Zachary Ramsay disappeared on his way to school in Great Falls, Montana, police investigated all possible leads to find him. One name on a list of suspects rose to the top: Nathaniel Bar-Jonah (born David Paul Brown.) Convicted of abduction, child molestation and attempted murder in Massachusetts, Bar-Jonah's crimes against children had escalated when he moved to the Big Sky State. It was only after the FBI decoded his cryptic...