Between 1966 and 1974, the Zodiac killer provided
more than 20 written communications to police officials,
some including ciphers that have not been cracked to this day.
Zodiackiller.com features the most complete collection of authenticated Zodiac writings available anywhere in the world. In fact, many of the letters and envelopes below were never seen by the public until posted here.
NOTE: There are many hoaxed Zodiac letters. If it isn't listed below, it's not considered by law enforcement to be an authentic Zodiac communication: