Theories on why he stopped?
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InjunNose — 9 years ago(January 06, 2017 04:42 PM)
The most interesting theory, in my opinion, was proposed in Mike Kelleher's book
This is the Zodiac Speaking
: that Zodiac suffered from dissociative identity disorder, and that the personality which committed the murders eventually was overpowered by a more normal personality. In that case, it could be entirely possible that the murderer has/had no conscious memory of his crimes.
But in the final analysis, of course, we just don't know.