It is practically impossible to look at the envelope of the December 1990 Eureka card from the standpoint of handwriting and determine whether this communication was mailed by the Zodiac Killer. The only way to significantly shift the needle on its authenticity or otherwise, is to compare it to other Zodiac communications, irrespective of whether these other communications have been authenticated or not. It is possible to compare two "questionable" Zodiac communications and make a case that both are genuine. It must be remembered that the January 10th 2001 Happy New Year card mailed by somebody claiming to be the Zodiac Killer was created without the knowledge of the 1990 Eureka card, because the Eureka card wasn't made public until 2007 (if different authors). .

The author of the 2001 card decided not to mimic any previous confirmed Zodiac communications (envelopes) that were publicly available to them, and opted to use the full newspaper address of "San Francisco Chronicle", never done previously in any Zodiac Killer communication widely accepted as genuine by the Zodiac community. However, it was done by the 1990 Eureka card author eleven years previously. The author of the 2001 card chose to use "901 Mission Street" on the envelope, never done previously by the Zodiac Killer. However, it was done by the 1990 Eureka card author. The author of the 2001 card chose to use the zip code of "94103" on the envelope, never done previously by the Zodiac Killer. However, it was done by the 1990 Eureka card author.

The only two times a real or questioned Zodiac communication began by using the word "Editor" at the beginning of the envelope, followed by "San Francisco Chronicle" were in 1990 and 2007. Both of these communications used only one punctuation, in the form of a comma after "San Francisco" on the fourth line. These were the only two communications addressed to the San Francisco Chronicle and suggested as Zodiac Killer mailings, that were festive greeting cards. So we have two festive greeting cards, beginning by addressing the "Editor" of the newspaper, with the full newspaper title of "San Francisco Chronicle", "901 Mission Street", the zip code "94103" and only one punctuation in the form of a comma after "San Francisco", who were apparently two different authors that decided to use no mimicry of earlier Zodiac communications, yet managed to copy each other in all these instances. Yet they did opt to mimic the "y" style number "4" used by the Zodiac Killer in his confirmed communications. A very strange affair indeed.    

​However, the letter mailed on May 6th 1986, four years before the 1990 Eureka card (and not publicly released), also began by using "Editor" on the first line of the envelope, followed by the full address of "San Francisco Chronicle". In fact, the 1986 envelope began with "To the Editor", similar in fashion to the 2001 Happy New Year card that began with "Letters To The Editor". The 1986 letter can be connected to the 1987 letter, which can be connected to the July 31st 1969 letter to the Vallejo Times-Herald. The 1986, 1990 and 2007 mailings are the only communications publicly available now, all consecutive to one another, that all begin by using "Editor" on the first line of the address, followed by the full newspaper title of "San Francisco Chronicle".     

The question we have to ask is this: Did two independent and separate hoaxers just happen to mimic each other in 1990 and 2007, but neither made any reasonable effort to imitate the previous communications of the Zodiac Killer? Was the author of the 1990 and 2007 communications the same hoaxer, who never made any reasonable effort to imitate the previous communications of the Zodiac Killer? Or was it the Zodiac Killer who authored both festive greetings cards, who placed no emphasis on attempting to imitate himself? A hoaxer of the Zodiac Killer, by his very nature, should want to imitate previous communications to convince the reader he is the real deal, but the actual Zodiac Killer has no such obligation because he is genuine article. In other words, a hoaxer of the Zodiac Killer communications, who fails to hoax properly, may not be a hoaxer.  

A business reply envelope postmarked Cleveland, OH, March 2nd 1981, bearing the press printed address "The Danbury Mint, Richards Avenue, P.O. Box 5260, Norwalk, Conn", contained the message "Please stop forced bussing or I will kill 3 more black boys in Atlanta in March". Six days later, a letter claiming to be from the Zodiac Killer arrived at the television station WXIA-TV "11 Alive" at 1611 West Peachtree Street, Atlanta, 30308 on March 8th 1981, stating "Hello its me. Haven't you people figured out who is killing these little people yet". I therefore went in search of other communications from these postmark locations that bore any similarity to the Zodiac Killer. The following find is extremely unlikely to have any connection to the Bay Area murderer, but it was a threatening greeting card that carried the same message apparently included with the Zodiac Killer's October 27th 1970 Halloween card, the arrival date carries some significance, the card was postmarked just 22 days before the 2001 Happy New Year "Zodiac" greeting card, which was mailed to the San Francisco Chronicle on January 10th 2001, and it was postmarked from Cleveland, Ohio, just like the March 2nd 1981 letter above.   

It was a threatening communication, cut into four pieces and mailed to the Republican Headquarters, 526 Superior Avenue Northeast, Cleveland, Ohio on December 19th 2000 to U.S. Senator George Voinovich, and received on December 20th 2000. Two stickers apparently came with the Zodiac Halloween card in 1970 with the messages "Thinking of you" and "Have a nice day". This greeting card, adorned with an image of flowers, also came with the message "Thinking of you". Three parts of the handwritten threat stated "Hey you stinking white bitch", "We don't want no TV bullshit" and "we will cut off your head and impale it on a spear". The envelope bore a zip code of 44126-1906 and a 33c upside down General Omar N. Bradley stamp.

In essence, we have a 2000 greeting card bearing the message "Thinking of you", the exact wording previously mailed with the 1970 Halloween card. The 2000 communication bore the postmark Cleveland, Ohio, the same as a potential Zodiac correspondence from 1981. The 2000 greeting card was postmarked 22 days before a suspected Zodiac greeting card on January 10th 2001. The March 2nd 1981, December 19th 2000 and January 10th 2001 communications all carried a racial overtone of "Please stop forced bussing or I will kill 3 more black boys in Atlanta in March", "Hey you stinking white bitch" and "Those bastard Muni Drive (The majority Black and asians) What happened to the White people Drivers we once had".

To find out the reason Senator George Voinovich was targeted, we have to look at his timeline on Wikipedia, where it states "In the Senate, Voinovich opposed lowering tax rates. He frequently joined Democrats on tax issues and in 2000 was the only Republican in Congress to vote against a bill providing for relief from the "marriage penalty". In previous suspected Zodiac communications the author had targeted many notable Democrats, so the fact Senator Voinovich "frequently joined with Democrats on tax issues" is in keeping with a Zodiac Killer of Republican persuasion attacking anybody who opposed his views. However, it must be stressed, that this greeting card was unlikely to have been mailed by the Zodiac Killer despite some of the overlapping features.

Recently we covered the January 10th 2001 Happy New Year card, stating it was likely mailed by the same individual as the December 1990 Eureka card, When the individual authored the 2001 card and mailed it to the San Francisco Chronicle, we have to remember that the 1990 Eureka card wasn't made public until 2007. Therefore, he couldn't have been imitating the design of the 1990 Eureka card envelope. There has been an over emphasis on comparing the handwriting between the two communications, with some believing the handwriting is a good match, and others not so sure - and this is par for the course. To determine whether these communications were created by the same author (or the Zodiac Killer) we have to analyze their composition and their layout.

For those who strongly believe the 1990 Eureka card is the Zodiac Killer, this is an important question. If the communications can be linked, then advocates for the 1990 Eureka card must advocate for the 2001 Happy New Year card also. It would rule out any suspects dead or incarcerated subsequent to December 1990 and up to January 10th 2001 such as Theodore Kaczynski, who was arrested on April 3rd 1996 and given eight life sentences. It would also rule out high profile suspect Arthur Leigh Allen, who died on August 26th 1992. Now obviously, staunch advocates of Theodore Kaczynski or Arthur Leigh Allen, who also believe that the 1990 Eureka card was Zodiac, will almost certainly reject the 2001 Happy New Year card by default, or now distance themselves from the Eureka card if it was proven beyond reasonable doubt it was linked to the 2001 card. Here is a comparison between the envelope handwriting before we move on.

Any hoaxer or copycat who wants to mail an imitation Zodiac letter, particularly in 1990 and 2001, has a wealth of genuine Zodiac communications to draw upon, including the envelopes. The November 16th 1970 Paul Avery newspaper article in the San Francisco Chronicle was one such example of how to address an envelope in Zodiac fashion. The need to mimic and convince the reader you are the genuine Zodiac, would supersede the requirement of the real Zodiac to convince the reader he is the genuine Zodiac. The real Zodiac doesn't need to convince anybody he is the Zodiac Killer, because he knows he is. One can therefore argue, that a communication in 1990 or 2001 that is pertaining to be from the Zodiac Killer, that looks nothing like the Zodiac Killer, could very well be from the Zodiac Killer. The need to mimic old communications is not a requirement for the real killer. So when researchers state that the 2001 Happy New Year card looks nothing like old Zodiac communications, they may very well be negating their own position of rejecting it. Why should the 1990 or 2001 handwriting look like the handwriting from twenty to thirty years ago. Handwriting varies over time and is easily manipulated.

The 1990 Eureka card and 2001 Happy New Year card, whether Zodiac or not, were mailed eleven years apart. We are not aware of any other Zodiac or copycat communications in between these years. If there has been any, they have not been released. We have to look at these two communications in respect to all the confirmed and suspected copycat letters from 1969 to 2001 (a span of 32 years). If these two communications were not the same author (and the 2001 author couldn't have copied the 1990 author), then it is unusual that these latter two communications are both festive greetings cards, never before mailed to the newspapers by the Zodiac Killer or a copycat in the thirty-two years prior. Not withstanding the handwriting, it is also the first time the Zodiac Killer or a copycat had employed the address format of "901 Mission Street" and the numbering "94103". So we have two communications, both are festive cards, and both use an envelope address format never employed in any previously publicized letters from the Zodiac Killer or otherwise. We have to ask the pertinent question of why a copycat would attempt to look nothing like the real killer. He is effectively imitating nothing the Zodiac Killer had done previously, and negating the art of imitation.       

Either the Zodiac Killer or somebody purporting to be the Zodiac Killer mailed a Happy New Year card to the San Francisco Chronicle on January 10th 2001, disgusted that San Francisco citizens were "getting murdered" by Muni drivers. The day before, on January 9th 2001, the Examiner ran an article describing how a Muni streetcar struck and killed pedestrian Guang Zhan Ouyang on Sunday, January 7th 2001. Another fatality occurred the following day on Van Ness Avenue. This newspaper article is courtesy of Cragle from Zodiac Killer Site forum - and is undoubtedly the trigger for the January 10th 2001 Happy New Year card. After all, the author opened up with the line [corrected] "Dear Sir. Wherever you are. This is disgusting to read, what seems to be a news that nobody really cares, but the relatives of innocent citizens murdered in our beloved S.F. It's always the pedestrians fault and never those bastard Muni drivers".

The Zodiac Killer was extremely fond of reacting to newspaper articles in his heyday, but what was it about this particular article that triggered such a response, just over eleven years after the December 1990 Eureka card (assuming the Zodiac Killer was responsible for both communications). Cragle pondered the question; Could the line "Noboby really cares but the relatives of innocent citizens MURDER in our beloved SF" allude to a relationship of some sorts to the person quoted in the article?

Here is another Examiner newspaper article, dated January 3rd 2001, describing the death of Brian Edward Cotter (18) as he played the game of "chicken" with a Muni streetcar. Thanks again to Cragle for supplying this cutting.

Here is a communication mailed to the San Francisco Chronicle on January 10th 2001 threatening the Muni drivers of San Francisco, widely believed to be somebody mimicking the Zodiac Killer. While this may be the case, one has to consider the style and format of the writing (particularly on the envelope) with respect to previous Zodiac communications. No other authenticated Zodiac communication prior to this one carried the address of "901 Mission Street" with "San Francisco, CA 94103". Additionally, no previous Zodiac communication (or suspected copycat communication) was ever mailed as a festive greetings card, other than the Eureka card, which is bound to this communication by three unique features. I believe Tom Voigt of Zodiackiller.com considers the Eureka card mailed in 1990 to be a plausible Zodiac correspondence, placing this communication in his "Letters from the Zodiac" section on the message forum.  

The Eureka card is the only other possible Zodiac communication addressed in near identical fashion to the 2001 offering (shown in tandem with the envelope below). The problem arises when we consider that the Eureka card was not discovered until March 3rd 2007 by editorial assistant Daniel King of the San Francisco Chronicle among some photo files. The 2007 Zodiac movie directed by David Fincher and based on the Robert Graysmith book, was released in the USA the day before this correspondence was unearthed, on March 2nd. The movie had its premier in Los Angeles and California on March 1st.

This means that whoever wrote the January 10th 2001 card, addressed it in near identical fashion to a previously unreleased and potential Zodiac communication (thought to be genuine by many). The Eureka card wasn't made public until 2007, so the author of the 2001 communication has a high probability of being the author of the December 1990 Christmas card. You cannot 'copycat' the handwriting or style of an envelope that hasn't been released into the public domain. If you believe the Eureka card to be genuine, it follows that you should lean towards the 2001 communication being genuine also. If you hold the opinion that Zodiac was still alive in 1990 mailing Christmas cards, then it is extremely likely he was still active in 2001 doing exactly the same thing. ​