The Zodiac gara n'ihu ikwu na ọ bụghị ya kpatara bọmbụ na-adịbeghị anya nke ụlọ ọrụ ndị uwe ojii na San Francisco (na-ezo aka na February 18, 1970, ọnwụ nke Sgt. Brian McDonnell ụbọchị abụọ mgbe bọmbụ bọmbụ ahụ dị na Park Station na Golden Gate Park) ma gbakwụnyere "enwere otuto karịa igbu onye uwe ojii karịa [sic] n'ihi na onye uwe ojii nwere ike ịlaghachi azụ". Akwụkwọ ozi ahụ gụnyere eserese nke bọmbụ nke Zodiac kwuru na ọ ga-eji gbapụ ụlọ akwụkwọ. Na ala nke bọs ahụ, o dere, sị: "My name is _____", nke a na-esote ya site na mkpụrụedemede 13-character cipher. Zodiac gara n'ihu ikwu na ọ bụghị ya kpatara bọmbụ ahụ na nso nso a na San Francisco (na-ezo aka na February 18, 1970, ọnwụ nke Sgt. Brian McDonnell ụbọchị abụọ mgbe bọmbụ ahụ bọmbụ bọmbụ ahụ dị na Park Station na Golden Gate Park) ma gbakwụnye "enwere otuto karịa igbu onye uwe ojii n'ihi na onye uwe ojii nwere ike ịlaghachi azụ".
= 12, SFPD = 0.