The Zodiac Killer Enigma: Cracking the killer code

On December 20th 1968 a young courting couple innocently parked their car on a remote Lake Herman road and were brutally shot to death, on the 5th July 1969 once again a young courting couple parked their car on Blue Rock Springs and were savagely shot to death. By a man who named himself, 'Zodiac.' He went on with his killing spree and ignited the media with his taunting of the Californian police with his letters and indecipherable codes. He never was caught and he goes down in the annals ...