10 Baffling Unsolved Mysteries With Strange Written Clues

aside from being some of the most famous unsolved mysteries of all time, there is one unique trait that links these crimes together: mysterious anonymous letters. One of the main reasons these stories have become so legendary is because they feature one or more letters written by an anonymous individual whose identity has never been uncovered. It’s fairly common for authorities to receive anonymous letters in prominent criminal cases, but while they often turn out to be hoaxes, the letters sometimes have an eerie credibility to them..