Great stuff for those interested in codes and their solving. (Over my head though!)

The hitman trapped by a codebreaker: Gunman convicted
after his secret message from jail was deciphered
(Daily Mail)
When a prisoner sent his sister a letter from his cell with a strange sequence of numbers on the back, police were naturally suspicious.

They feared Kieron Bryan, 23, was trying to get secret messages to those on the outside.

And, after hiring one of the world’s leading codebreakers to decipher the message, their hunch proved correct.

It helped expose Bryan as being responsible for shooting a strip club doorman.
much more, including the coded letter and a sidebar on how Dr John Olsson, the forensic linguist called in by police, cracked the code - at DM link above