Donna Ann Lass Were the 13 punch-holes on the "13-Hole" postcard signifying the burial sites of his 13 victims? The Zodiac Killer victim total hadn't increased from July 26th 1970 to the time the "13-Hole" postcard arrived at the San Francisco Chronicle, so why didn't the Zodiac Killer increase his victim count in October to include Donna Lass from September 6th 1970, if he was her murderer? Was it because she was only currently recognised as a disappearance and the Zodiac Killer wanted to play games with law enforcement, which he would ultimately achieve when he mailed the "Pines" postcard on March 22nd 1971? Or was he writing "13" on the postcard as confirmation, because his July 26th 1970 letter claiming the same number of victims, was not currently published in the newspapers.
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