In the confirmed attacks, Zodiac targeted three male-female couples and one male taxi driver. Five victims died and two recovered from serious injuries. There were unusual aspects to the crimes, including publicizing the attacks and using an odd mix of variation and repetition. Zodiac even wore a costume for the third couple attack. Initially, investigators were observant and open-minded. And then law enforcement decided that a psychological profile completely defined the killer. There were few, if any, unconfirmed attacks. Goals, repetition, themes, and fantasies were insignificant. Cognition ended. Amateur researchers, fortunately, have for decades suggested a wide range of victims and themes. While most individual ideas do not have concrete value, the spirit of exploration is appropriate for the Zodiac case. Researchers continue to fill the analysis void left by law enforcement's withdrawal. It is now clear that Zodiac killed before the first confirmed attack. Later attacks are less obvious, but the total likely is several dozen. Vehicles, water associations, and repeating names can hint at Zodiac responsibility for unsolved killings. Hitchcock dramas appear to have been a core theme. While this book is unlikely to let you discover Zodiac attacks that have never been discussed, the search can be intriguing.

Sandy Betts has researched the Zodiac case for over three decades.