The infamous serial killer murdered at least five people in northern California, U.S, during 1968 and 1969.
The Zodiac was never caught despite sending a series of taunting letters and word puzzles to San Francisco newspapers up until 1974.
Some were accompanied by bloodied fragments of clothing as proof.
The Zodiac s infamous 340 Cipher sent to the San Francisco Chronicle in 1969, accompanied by the Dripping Pen card
One of the four ciphers was solved in 1969, in which the Zodiac said he was killing people to collect as slaves for the afterlife.
The remaining three cryptograms have captivated amateur sleuths for more than 50 years in the hope that solving them may lead to the identity of the killer.
After 51 years, the Zodiac Killer s cipher has been solved by amateur codebreakers
1075thegame.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from 1075thegame.com Daily Mail and Mail on Sunday newspapers.
51 years later, coded message attributed to Zodiac Killer has been solved
boston.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from boston.com Daily Mail and Mail on Sunday newspapers.