If one were somehow able to narrow 1969 Vallejo male residents down by Zodiac age-range, how many names approximately would that yield?

There were 52,000 white people classified in 1970. Roughly 25,000 would be men.
http://www.bayareacensus.ca.gov/cities/Vallejo70.htm

Age range 25-45 make up about 30% of the population based on USA population today.
https://www.infoplease.com/us/comprehen … istics-342

Therefore 30% of 25,000 gives us 7,500 white males between 25-45.
Narrow that further using what we have learnt about Zodiac, driving license, possibly make of car, hand writing (assuming it wasn’t disguised), height, weight, hair (not bald), criminal record, profession, my guess it wouldn’t be too difficult to find him, as Kim Rossmo pointed out. If the investigation was in full swing today, and Zodiac was a resident of Vallejo in 69/70, I don’t doubt for a second he would be identified.

Shift the age range to 35-45, or 25-35 and the field narrows considerably. Start with the narrow age range first, then move out.

Therefore 30% of 25,000 gives us 7,500 white males between 25-45.
Narrow that further using what we have learnt about Zodiac, driving license, possibly make of car, hand writing (assuming it wasn’t disguised), height, weight, hair (not bald), criminal record, profession, my guess it wouldn’t be too difficult to find him, as Kim Rossmo pointed out. If the investigation was in full swing today, and Zodiac was a resident of Vallejo in 69/70, I don’t doubt for a second he would be identified.

I’m sure Vallejo PD would love to carry out a full scale investigation based on Rossmo’s guidance, but unfortunately they don’t have the time or resources.

Regardless, I’m very excited and optimistic about what this forum is planning to carry out.

Casually looked into portions of Bush Street in 94104 zip.

Between Sutter and Pine we have businesses such as the Crown Zellerbach Corp, Phillips Petroleum and Bank of California

Where Battery St intersects we have businesses such as Shell Oil, Xerox, various magazine companies businesses devoted to television/radio artists, actors and extras, surveyors, architects

Where Sansome St intersects we have businesses such as Chevron Chemical and Standard Oil

Where Belden St intersects we have businesses such as United States Stamp Co (whatever that is)

Not a complete list. Only highlights of companies reminiscent of things we have talked about regarding the Z. For example, Crown (which I initially thought was a petroleum company), was actually a pulp and paper company. They invented the envelopes with the see through window. PGE was the first to use it. Phillips Petroleum – Phillips 66 map. Standard Oil – Phillips 66 map. Television/radio I’m thinking of Mikado and with the actors I’m thinking about dirty Harry. Not all inclusive. Just thoughts off top of head.

Are any of these the reason he was in 94104? Do any of these have anything to do with companies in the other zips we know he mailed from? The same for residences.

Why is he here? That’s what I’m shooting for.

Soze

Moore dry dock, the company that repaired /serviced the zodiac schooner, has an office located on California street in the 94104 zip. The Donahue brothers started out as blacksmiths before they delved into gas/water/lighting that would later become pge. The Moore dry dock is a descendant of the blacksmith company.

In addition to Moore there are several marine/Maritime companies and steamship companies. The steamship companies I’ve looked at so far had their dealings in mail.

Soze

Moore dry dock, the company that repaired /serviced the zodiac schooner, has an office located on California street in the 94104 zip. The Donahue brothers started out as blacksmiths before they delved into gas/water/lighting that would later become pge. The Moore dry dock is a descendant of the blacksmith company.

In addition to Moore there are several marine/Maritime companies and steamship companies. The steamship companies I’ve looked at so far had their dealings in mail.

Soze

There does seem to be a few coincidences with PG&E. Currently I’m trying to pull together a list of their employees from 1969 in Vallejo. Long shot but I feel it’s worth a look.

Also there was a number of attorneys in the 94104 ZIP.

posted in error

I think you have to factor in who could have been available to leave work and drive to various points in the city on weekdays in order to mail letters. In my view that would tend to eliminate those who had typical 9-5 jobs in the financial district downtown.

I think you have to factor in who could have been available to leave work and drive to various points in the city on weekdays in order to mail letters. In my view that would tend to eliminate those who had typical 9-5 jobs in the financial district downtown.

I think I would agree, and would tend towards thinking about people who are actually in driving jobs (e.g. delivery), or whose job requires driving to get to clients (e.g., door-to-door insurance salesman, real estate).

Agreed. And/or I might start with someone who worked or had business along the 19th Ave corridor.

A massive long shot still, but in my view less of one than tracking individuals who worked downtown.

I think you have to factor in who could have been available to leave work and drive to various points in the city on weekdays in order to mail letters. In my view that would tend to eliminate those who had typical 9-5 jobs in the financial district downtown.

I think I would agree, and would tend towards thinking about people who are actually in driving jobs (e.g. delivery), or whose job requires driving to get to clients (e.g., door-to-door insurance salesman, real estate).

"Peek Through the Pines" card was derived from a real estate ad. http://www.zodiackiller.com/PTTPS.html

Does the top of the 6/bottom of the 9 match? It looks like more curl to the top of the 6.

I’m a little confused by the discussion in relation to this postmark stamp. Not because I don’t think that the code on this one looks like a ’68’, because it does. Rather, my confusion is around believing that this is not, in fact, the postmark from the Halloween card envelope.

If you look at the photocopy from the FBI files, which Cragle posted around May 07 IIRC – which you have to believe is the one we should be looking at – there are indisputable differences.

In the FBI copy, there is some distortion from the circular, which I have corrected in making the comparison below (FBI on right):

You will immediately be able to note the following differences:

[list=1]

You will also notice that the postmark in the copy of the FBI letter has the line through it where – as on many of the Zodiac documents – an area has been marked as being potentially of interest for fingerprints.

Basically, I cannot say where the postmark stamp on the left is from, but it is clearly not that from the envelope of the Halloween card and hence must be ignored for comparison purposes.

I would then want to suggest that to my view – and from the point of view of consistency with other marks – the mark in question at 4 o’clock reads as ‘6B’.

Okay, here’s what’s wrong.

The postmark that I have questioned is clearly taken from this image, below:

And here is the problem. The image comes from here, where you will find the accompanying text:

Here is the replica. I put scale in for an experiment..you will see more on this in a moment.. oddly enough.. I got it dead on.

So, there you go!

Cragle,

Yes, this is terrific. There DOES seem to be a pattern. The early letters were mostly mailed from northern SF, but as time passed the letters became more and more far flung. I wonder if this can be attributed to Zodiac’s behavior or perhaps a change in the way the letters were picked up and processed.

Do you have any observations?

One inference that I would want to consider in regard to your interesting mapping is that the increasing dispersion of (particularly) the later mailings may simply be indicative of the fact that they were not sent by the original letter writer – i.e., copycat. Surely this has to be considered, given that a paring back to the canonically ‘authenticated’ letters and mailings – including the not-unreasonable argument that even the Exorcist letter is non-genuine – removes the dispersion pretty much (excepting, I think, Pleasanton). That is, if (as I would) you read the coding on the Johns and Halloween mailings as ‘6B’.

Interesting analysis Shaq.

Or . . . the guy lived in the Richmond/Sunset district, and then moved.