AZ UnsolvedAn investigation into the puzzles left by the Zodiac using ancient, medieval, and modern science.
Thanks to the work of a good friend, who compiled nearly 4,000 letters from the Opinions of the People column in the Vallejo Times-Herald dated January 1, 1966 to December 31, 1971, we may have uncovered a new letter potentially authored by the Zodiac killer. Published on October 27, 1969, this letter signed “Concerned Father” […]
The following analysis includes five individuals, some of higher education, some British authors, and some publicly accused Zodiac suspects, in an effort to determine which writer or writer’s background most closely aligns with the grammatical features found in the Zodiac letters. The Zodiac Suspect Corpus This corpus includes known documents from three Zodiac suspects and […]
Many speculate that the Zodiac Killer’s logo is a crosshair (Figure 1), given a gun was his weapon of choice, and others think his brand was inspired by a Zodiac watch (Figure 2). But why would both the killer and the watch brand adopt the same emblem? Turns out, there is a very significant astrological […]
This article explores the hidden meaning behind the map sent to the press by the Zodiac Killer. Drawing upon clues from his Halloween card and other correspondences, this map unveils a possibility the Zodiac Killer was using a map-based methodology. Overview On June 26th, 1970, the Zodiac Killer sent a letter with his Mount Diablo […]
AZUnsolved created Mount Diablo Radians and Inches, an ArcGIS online webmap, to help researchers visualize the various geographic aspects of the Zodiac case, and specifically regarding the unsolved Z32 cipher and associated Philips 66 map. The Phillips 66 map sent by the Zodiac was an inset map cut out from a larger California road map. […]