If you think you’re a good enough codebreaker to help the FBI solve a murder, give it a try. Warning: The code that you’re supposed to break is one that experts from “the FBI’s Cryptanalysis and Racketeering Records Unit (CRRU) and the American Cryptogram Association” couldn’t manage to break. The encrypted text is here.
Special prize: If you do crack the code, I will post your photo, together with a photo of me bowing and a caption, “I’m not worthy! I’m not worthy!” Thanks to Brian Torrez for the pointer.