…. The Mt. Diablo code concerns Radians + # inches along the radians."[40] In 1981, a close examination of the radian hint by Zodiac researcher Gareth Penn led to the discovery that a radian angle, when placed over the map per Zodiac's instructions, pointed to the locations of two Zodiac atta...
Gareth Sewell Penn (born 1941 in Carmel, California) is an American true crime author and amateur detective known for being among the first non-journalists to write about the famous ...