But the only thing linking the Betsy Aardsma killing to the Zodiac is a date, a similarity to the appearance of Cheri Jo Bates, both women were young college students with an independent mind, along with the library connection, albeit each crime was perpetrated at different times of the day, with one inside the library and the other in an alleyway beside the library.
It has also been shown that a possible overlap of Betsy Aardsma and Theodore Kaczynski occurred when Betsy spent time at Ann Arbor from 1966-67, which coincided with Kaczynski for one year, plus he was also spotted in the Pennsylvania State Library on November 27th 1969 just one day prior to her murder according to an eyewitness.
But despite tenuous links to the Zodiac, it falls short on a number of issues, namely the Zodiac attacks tended to be committed in isolated retreats with limited possibility of capture such as Lake Herman Road, Blue Rock Springs Park and Lake Berryessa. The only confirmed deviation to this was the taxi cab murder of Paul Stine, but as many have conjectured this may not have been a planned murder, but more of an impulse killing.
Betsy Aardsma was killed in the daytime at around 4.45pm, with high risk involved and although the Zodiac always laid claim to more killings than could be accounted for, no reference to this crime was evident in any of his subsequent correspondence and just because a murder was committed around the Zodiac timeline is no proof of his involvement.
Richard Haefner became a prime suspect in the case and details about Haefner can be found following the three links below, that includes a composite sketch of a potential suspect from the library that afternoon.
READ THIS ARTICLE ABOUT BETSY AARDSMA FROM THE POST GAZETTE IN 2009
AND ALSO FROM THE LANCASTER ONLINE IN 2010
(19th August 1956-28th November 1981)
Joan Lucinda Webster, a 25 year old Harvard graduate, disappeared after her arrival at Boston's Logan International Airport, on 28th November 1981, and her remains were discovered nearly nine years later in April 1990 in Hamilton, Massachusetts.
The cause of her death remains undetermined and nobody has been charged with her supposed abduction and murder.
The case is constantly kept alive by determined individuals keen for a resolution to this 32 year old murder mystery.