One then finds the junction between the message's letter and the key phrase's letter on the Square (the message's letter on the left - hand side and the key phrase's letter on the top), and records the letter at their junction, as follows: Message: h o w, i s, t o n i g h t, d i f f e r e n t, f r o m, a l l, o t h e r, n i g h t s Key: c o m, e r, e t r i b u t, i o n c o m e r e, t r i b, u t i, o n c o m, e r e t r i Cipher: j c i, m i, x h e q h b m, l w s h s d i e x, y i w n, u e t, c g j s d, r z k a k a Deciphering the message entailed reversing the process by finding
the cipher letter on the left - hand side of the Square and the key - phrase letter on the top side of the Square, and recording the letter at their junction.
Over the course of the next decade, the killer taunted police and the media with a series of
ciphers and
letters of confession, never revealing his identity.
As a serial killer terrifies the San Francisco Bay Area and taunts police with his
ciphers and
letters, investigators in four jurisdictions search for the murderer.