OPORD Analytical Founder Unmasks ' Zodiac' Killer
In the late 1960’s the Zodiac killer stalked Northern California for nearly a year and is responsible for at least five verifiable murders between December 1968 and October 1969. He coined himself ‘the Zodiac’ through a series of taunting letters sent to the press until 1974. The Zodiac’s letters contained 4 ciphers in all, with 3 of them still unsolved. Or are they?
While attempting to decode the nearly forty-year-old ciphers sent to the press by the infamous Zodiac killer has been a pastime for police, experts, and ordinary citizens, Christopher Farmer just might have solved the puzzle.
The founder and president of OPORD Analytical became interested in the Zodiac case while attending Graduate school in 2004. The challenge that these unsolved ciphers have presented over the years seemed to good to pass up. While relying on the Zodiac’s superior skill set in the area of cryptography, Mr. Farmer went to work and managed to crack the Zodiac’s “My Name Is” cipher that same year.
Christopher Farmer is an expert on terrorism, revolutionary theory and emerging revolutionary movements, ideology linguistics and political violence. He is also a former a decorated Army serviceman who has traveled on operations spanning well over two dozen foreign countries. He holds a Master of Science Degree in National Security and Public Safety from the University of New Haven’s School of Public Safety and Professional Studies. And he is also a member of The Association for Intelligence Officers and listed in Marquis Who’s who in the World, and Marquis Who’s who in America.
While Mr. Farmer boasts a very impressive record, does all of this mean he is capable of cracking codes which have proved “uncrackable” for police and experts for closing in on forty years? To Mr. Farmer and anyone else who subscribes to the idea that “if someone can build it, then someone can unbuild it” it certainly does.
After decoding the “My Name Is” cipher in 2004, Mr. Farmer waited until after he started his OPORD Analytical intelligence company in 2006 before resuming work on the ciphers. By using his own time, knowledge, and only evidence that was already made available, Mr. Farmer successfully decrypted the Zodiac’s "Button" cipher as well as a ‘Halloween’ card and ‘Dragon’ card sent to the press by the mysterious Zodiac.
Through his work, Mr. Farmer believes he has isolated the identity of the Zodiac. Both the ‘Dragon’ card and ‘Halloween’ card give clues to the man behind one of the greatest unsolved mysteries of our time.
By using cryptography, Mr. Farmer may not have only unmasked the Zodiac killer, Gareth Penn, but he also suggests that there could be more victims left unaccounted for. In a world where serial murder has turned into a profitable business, it is only fitting that Mr. Farmer, a man who charges no fees for his work on unsolved murders would be the one to finally put the mystery of the Zodiac killer to rest.
Mr. Farmer explains that the ciphers have remained indecipherable for all these years due to poor understanding of cryptography solutions, which he uses a basis for his findings. Mr. Farmer also believes that the ciphers were created in the first place to challenge the great minds of the time, and the cryptic messages remained hidden so long due to not having a solid handle on the methods used by the Zodiac to create them in the first place.
While there are many websites and publications devoted to research on the Zodiac killer, Mr. Farmer and OPORD Analytical may be the only ones to make a definite case for just who the Zodiac was, and what secrets these previously unsolved cipher’s have kept hidden for all this time.
As of March 2007, the Zodiac case has been reopened by the San Francisco Police Department. The case also remains open is other jurisdictions. You may view Mr. Farmer’s groundbreaking report of his work on the Zodiac case at the OPORD Analytical website.
All information related to Christopher Farmer and his work contained herein was sourced from OPORD Analytical and Christopher Farmer.

