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". 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 Zodiac communication. The Eureka card wasn't made public until 2007, so the author of the 2001 communication with near certainty had to be 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 believe the 2001 communication to be 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.