Let’s not forget that Zodiac indicated some acumen in electrical engineering in his Bus Bomb diagram and he wore Wing Walker boots which many electric company workers wore as well (insulation from electrical charge).

Pge can also be tied to water as well as the Livermore valley and Uc Berkeley cyclotron. Mr. Lowe came up with Jason (a reason for the 5 xs and I furthered it with cyclotron). So it can also be tied to Phillips 66 map.

By the way, nice catch Cragle.

Soze

Richard –
Agree 100%. If he did hand deliver the letter to the SFC it would also mean that he diverted away from his apparent pattern of using dropboxes right off of Route 1. This would break his pattern. Sometimes a break in a pattern is more illuminating than the pattern itself.

Cragle –
Also agree. I think this indicates that if he lived in American Canyon/Vallejo, then he likely took the 101 across the Golden Gate Bridge and did his mailings in the northwest corner of San Fran.

I think this could be big. I’d love Kim Rosso’s input on this.

So, this has got me thinking.

Having looked closely myself at Rossmo’s GeoProfile for the Zodiac killer, I am also currently quite sold on the idea of his living in the areas around Vallejo and up into American Canyon. The evidence of the mailing drops, and the broad familiarity with the Presidio of San Francisco, also seem to point towards his working in San Francisco, and likely in a Mon-Fri, 9-5 job according to the timings of the killings. (I also very much like the idea of his having parked somewhere close to the Lyon Street steps on the night of Stine’s murder.)

Recently, I’ve been doing some specific research around the 1968/9 Vallejo City Directory, and it occurs to me that it may be helpful that the listings are under the name of the male head of the household and also give this person’s general employment details.

I haven’t specifically looked at individuals who are listed as living in Vallejo and who are employed either in San Francisco, or in jobs that might take them to San Fran (such as, say, insurance salesmen). But I am wondering now whether there would be any merit in a group attack to see what kind of a list would be generated from the Rossmo GeoProfile area directories on these criteria.

If such a list proved meaningful, it might then be possible to undertake basic genealogical research to limit the set down further based on age and ethnicity criteria.

My first choice would be the half mile radius around the payphone, with American Canyon a close second. California State Route 37 being an important link to all four crimes. I believe without DNA, geographical profiling is our best hope.

Kim Rossmo, referring to Lake Herman Road and Blue Rock Springs Park, stated "In contrast, his target selection at Lake Berryessa and San Francisco did not show any evidence of local area knowledge. Also, the time lapse between the Blue Rock Springs shooting and the Zodiac’s telephone call was approximately 40 minutes, even though the distance between these two locations is only 3.5 miles (7 minutes normal driving time). What did he do for that other half hour? One possibility is that he returned home and disposed of his weapon. If so, that means he most likely lived within a five-mile radius of the crime site. The Zodiac also knew to telephone the Vallejo Police Department, even though the Blue Rock Spring Golf Course and park area was an unusual offshoot of municipal jurisdiction, totally surrounded by Solana County. The Zodiac’s comfort zone clearly includes the Vallejo area."

Try the different models here (top left of page) http://geographicprofiler.com/crimes/zodiac-killer

Many serial killer geoprofiles can be examined here http://geographicprofiler.com/crimes

Toggle geoprofile to view locations under the heat map.

My first choice would be the half mile radius around the payphone, with American Canyon a close second. California State Route 37 being an important link to all four crimes. I believe without DNA, geographical profiling is our best hope.

The population of American Canyon in 1980, the oldest record I could find, was under 6,000. WMA population when Zodiac is active should be pretty small.

From a psychological angle, AC makes sense as his base. He travels down to his hunting grounds and returns to a sparsely populated comfort zone.

So, what stocky, Caucasian male between the ages of 25 to 45 lived in American Canyon in a house with a basement and worked in northeast San Francisco?

I’m only half-kidding.

So, who in American Canyon lived in a house with a basement and worked in northeast San Francisco?

I’m only half-kidding.

American Canyon looks like a pristine rural area with plenty of outdoor pursuits. Perhaps including hunting wild game in the forest…

So, who in American Canyon lived in a house with a basement and worked in northeast San Francisco?

I’m only half-kidding.

American Canyon looks like a pristine rural area with plenty of outdoor pursuits. Perhaps including hunting wild game in the forest…

https://legallabrador.com/california-hu … nyon-unit/
Authorized Activities:
Waterfowl hunting: geese, ducks, coot & moorhen
Upland game bird hunting: doves, pheasant, quail & snipe
Small game hunting: rabbits

There is a hunting culture in AC including, apparently, a problem with poaching. Laxer regulations 50 years ago I would assume. Not that laws would stop a serial killer from poaching game (see GSK).

So, what stocky, Caucasian male between the ages of 25 to 45 lived in American Canyon in a house with a basement and worked in northeast San Francisco?

I’m only half-kidding.

Does anyone know which City Directory from the time – which would hopefully cover employment, and whether in San Fran. for the mailboxes – would cover American Canyon? I’d seen somewhere that it might be the Napa directory, going south. But I have access to this for 1968/69, and it doesn’t seem to list any addresses in AC.

The area of Chabot Terrace is interesting as it has a Donner Pass Rd in it.

So, what stocky, Caucasian male between the ages of 25 to 45 lived in American Canyon in a house with a basement and worked in northeast San Francisco?

I’m only half-kidding.

Does anyone know which City Directory from the time – which would hopefully cover employment, and whether in San Fran. for the mailboxes – would cover American Canyon? I’d seen somewhere that it might be the Napa directory, going south. But I have access to this for 1968/69, and it doesn’t seem to list any addresses in AC.

Vallejo covered bits of American Canyon

So, what stocky, Caucasian male between the ages of 25 to 45 lived in American Canyon in a house with a basement and worked in northeast San Francisco?

I’m only half-kidding.

Does anyone know which City Directory from the time – which would hopefully cover employment, and whether in San Fran. for the mailboxes – would cover American Canyon? I’d seen somewhere that it might be the Napa directory, going south. But I have access to this for 1968/69, and it doesn’t seem to list any addresses in AC.

Vallejo covered bits of American Canyon

All of the street names: https://geographic.org/streetview/usa/c … anyon.html

AC looks to be covered by Napa also.

So what about the mailboxes/post office? We giving up?

Soze

So what about the mailboxes/post office? We giving up?

Soze

I’m not

Good. So what’s the game plan at this point?

Soze