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Gareth Penn was born January 1, 1941 in Carmel, CA is an American author and, in his own words, a "medievalist, artillery surveyor, free lance writer, economic researcher, reference librarian, and receptionist in a robot factory."
Penn authored a book about the killer's motives and named Michael O'Hare, a professor at the University of California at Berkeley, as the Zodiac Killer.
Christopher J. Farmer, a self-described national security and forensic technology expert, has gained some notoriety recently with his accusation that Gareth Penn is the Zodiac.
Using circumstantial evidence and cryptographic analysis, the founder of OPORD Analytical, recently came to this conclusion, publishing his explanation on his website.
A graduate of the University of New Haven’s Henry C.Lee College of Criminal Justice and Forensic Sciences with a masters degree in national security and public safety, Farmer's work was featured in a July 30, 2007 American Chronicle article entitled OPORD Analytical Founder Unmasks Zodiac Killer.
"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," writes the story's author Frank Brooks.
Christopher J Farmer's Theory on the Zodiac Killer
American Chronicle article - OPORD Analytical Founder Unmasks ' Zodiac' Killer
The Rhyme of the Radian from Labyrinth13, Curt Rowlett.
Two New Theories Regarding the Zodiac Case, Mike Cole.