Zodiackillersite.com

To me it seems obvious that whoever the killer was, he was lying all the way. He hadn't just sprung from some prison in Montana and he wasn't headed for Mexico.

If there is a "clew" anywhere here it must be about his choice of words - i.e. that the particular prison he happened to mention meant something to him, in one way or another. If we presuppose that it was Z who committed this crime, we can perhaps allow ourselves to think that his words were rehearsed, that he was working from a "script" of sorts, that he had rehearsed this attack in his mind before executing it. And as such, the name of the prison could be significant - but in what way? Hard to tell.

I struggle to see how it is significant when in his mind he was going to kill them. As the ole cliche goes "dead people don't talk".

I am not sure just how rehearsed it was, I read a few reports that he may have been targeting the girls initially, the ones that assisted with the sketch of the rather "good looking" man that was smoking.

How valid do you guys consider the semi cracked 420 claims? About him being watched at the lake and "popping another pill"?

The man the girls drew in the sketch was also observed with what appeared to be a white shirt falling from the back of his trousers, this was most likely the nylon cord, he was carrying in his back pocket and this man and the Zodiac were probably one and the same. One of the girls also stated he was wearing a black short sleeved sweater shirt bunched up at the front, this may be where he holstered his knife.
His story about killing guards, mexico etc, is for certain a lie, but somewhere within his dialogue with Bryan Hartnell, it is not inconceivable he let slip an important word or grain of truth, that he had once experienced in his life, ie there maybe a Deer Lodge, Montana or Colorado connection, but we are heavily reliant on a drugged up Bryan Hartnell, one day after the attack, being 'coerced' with a poor interview technique by an eager John Robertson, dropping words into Bryan Hartnell's mouth.