Zodiackillersite.com

AK Wilks wrote:Yes I think Zodiac did have a thing for anniversaries and remembering specific dates. Almost every single point in the Zodiac case can and has been debated. But I think a majority of Zodiac researchers would agree that he seemed to recognize anniversaries of significant events.

Maybe others can chime in here and give more examples of other incidents of anniversaries recognized and/or weigh-in in favor of or against that theory. Just off the top of my head I can think of the following instances of Zodiac seeming to commemorate an anniversary:

1. Bates confession letter received on roughly one month anniversary of Bates murder.

2. The "Bates had to die" letters sent on the six-month anniversary of the Bates murder.

3. Letter to Belli sent on 12/20/69, the one-year anniversary of the murder of Faraday and Jensen on 12/20/68.

4. The "Peek through the Pines" card, generally thought to give clues about Donna Lass, sent on the one year anniversary of the Kathleen Johns attack and roughly six months after the disappearance of Donna Lass.

In regards to the Midwest family murders and college girl murders that I have looked at Zodiac and/or Kaczynski as possibly being a suspect in, there are a number of intriguing anniversaries that seem to be noted, MO matches, fathers connected to high tech businesses and/or politics. Or could they all just be coincidences?

9/19/66: Valerie Percy killed by hammer and long knife in suburban Chicago. Father ran high tech business Bell & Howell and is Republican candidate for US Senate.

9/27/66: Bricca family bound and killed by long knife. Father works for high tech business Monsanto as a chemical engineer.

11/28/66: Bates confession letter mailed. Murder took place by short knife, within one day of a fall holiday, Halloween, and just outside a college library. A morbid poem about stabbing a girl in a red dress is written on a wood surface and signed by the initials RH. Taunting letter sent.

6/25/68: Robison family killed by gun and hammer. ZODIUS writes to newspaper, gives inside details, demands name appear. Father works for business with a high tech plan plan to expand and computerize airport services and warehouses.

9/27/69: Hartnell and Shepard bound and attacked by long knife, Shepard killed. ZODIAC writes to newspaper, gives inside details, demands name appear.

11/28/69: Betsy Aardsma, wearing a red dress, is killed by a short knife inside the college library at Penn State University. Murder takes place within one day of a fall holiday, Thanksgiving. A morbid phrase about death is written onto a wood surface and signed by the initials RSK. Taunting letter sent. In November, Zodiac claims seven victims, but in December letter said next victims would be ninth and tenth. Was Aardsma number eight?

11/28/81: Joan Webster, Harvard University student, abducted and killed in Massachusetts. Father is former high ranking CIA official who at the time was a leading executive of high tech company IT&T.

9/27/82: Seven people killed in suburban Chicago by cyanide placed in Tylenol bottles. Caused huge losses to Johnson & Johnson, some newspapers dubbed the culprit the Tylenol Terrorist and speculated that the motive could be a hatred for a high tech company involved in the prescription and over-the-counter drug business.

So, setting aside what I see are the potential similarities and matches in victims, MO, weapons, settings, etc., do the repeating dates also suggest links between these crimes and an offender like Zodiac who recognizes anniversaries?

I don't know for sure. But there 365 days in a year. So is it pure chance that four crimes occurred the day or week of September 27? Three on September 27? Two involving binding and killing couples with a long knife and two involving suburban Chicago. Or that three murders involve November 28, all involving victims who are female college students, two at or in a college library?

Jelberg wrote:

both published in 1969

maybe there is something in his math publications that could be of use? Riemann surface?