Gareth Penn

Gareth Sewell Penn (born January 1, 1941) is an American true crime author and amateur detective known for being among the first non-journalists to write about the Zodiac Killer case. He published a theory about the killer's motives, publicly accused a noted UC Berkeley public policy professor of the crimes, and labeled himself a one-time suspect. Reviewing the 2007 David Fincher film Zodiac for the Las Vegas Weekly, Mike D'Angelo wrote, "I think the movie erred in selecting author Robert Graysmith as its source and nominal protagonist. Zodiac buffs know well that the true obsessive is a fellow named Gareth Penn." Penn graduated from the University of California, Berkeley in 1962 with a Bachelor of Arts degree (BA) in Germanic languages and again in 1965 with a Master of Arts (MA) in Medieval Germanic languages. He received a Master of Library Science (MLS) from U.C. Berkeley in 1971. In 1965, Penn entered the United States Army in Berlin, Germany and received basic training at Fort Dix, New Jersey. He received artillery survey training at Fort Sill, Oklahoma, where he became an Artillery Surveyor Instructor. He received the National Defense Service Medal and the designation of Expert Rifle Marksman. In 1967, Penn moved back to Berkeley, California, where he was transferred to the Army reserves. He was honorably discharged in 1971. Penn's writing, mostly focused on the Zodiac case, was largely published in The Ecphorizer, the newsletter of the San Francisco chapter of Mensa International, which had a peak readership of 700 and was published between 1981 and 1995 A 1972 piece he wrote while attending UC Berkeley, Gottfried von Strassburg and the Invisible Art was published in the peer-reviewed journal of Germanic studies Colloquia Germanica. The piece is a reflection on the legend of Tristan, a 12th-century hero of Celtic folklore. Penn says his father, Hugh Scott Penn, who had been a U.S. Army cryptographer during World War II, introduced him to the Zodiac case while he was working for the California Department of Justice.