Zodiac~What was he?

      Sources from 2007 Paperback.

He could have been a man in the military who was stationed in San Francisco. The spacing for the murders were almost perfect for this type of activity. The Wing Walker shoes, the cipher training, the shoe shine, Navy clothes and crew-cut hair seemed to fit the military. There's only one thing. How could he keep returning to San Francisco for each murder--that seems to rule the military out.

      The Zodiac was not a paranoid schizophrenic. He was a sexual sadist. Therefor he couldn't have a double identity unknown even to himself and therefor he was probably not a mental patient who was released or escaped periodically. During those times he couldn't become active as a killer. (This might conflict with one of the earlier paragraphs). The Zodiac would know what he was doing and would remember the same.

       There was a theory that there were two Zodiacs. One would do the killing and one would do the writing. Sargeant Lundblad suggested this long ago. However it's doubtful that both people could keep such a big secret so this theory can be ruled out.
      
       There was also a theory that he was a traveling salesman who killed people from county to county and state to state. He might have been a hunter who had become bored with animals and started with people for a change. However I think this theory is weak.

       Maybe there was no Zodiac as a person. The whole thing might have been one big lie. It might have been a man who took credit for any murder as it came along. The bloody shirt of Paul Stein's and the3 printing on the Carman Ghia almost rules this theory out but not entirely.

       The best, and most creepy, theory is that he was a member of law enforcement. The things he knew and the way he thought pointed this way. He could have actually searched for himself. The techniques he used were those of a law officer.