Was the design of the Pines postcard driven by a desire to inform investigator's where the body of Donna Lass was buried, or were the measurements related to it just an unusual coincidence? The initial point of interest was the upside down pasted wording of "around in the snow" and whether we had to flip the postcard through 180 degrees to locate the remains of Donna Lass "around in the snow". In doing so, it repositioned the punch-hole west of the "Sierra Club" pasting on a horizontal plane, exactly like the relationship between Yuba Gap and the Clair Tappaan Lodge Sierra Club. The 2.19 inch distance between the "Sierra Club" pasting and the center of the punch-hole was 14.02 miles using the Mount Diablo map scale of 6.4 miles to the inch, employed by the Zodiac Killer on June 26th 1970. This distance on Google maps landed just shy of Yuba Gap, 997 meters southwest of the jawbone of Donna Lass, within the 1.96 square mile circle represented by the punch-hole. Then we measured the radian angle between the home of Donna Lass and Yuba Gap, and the radian angle between the Sahara Tahoe Hotel & Casino and Yuba Gap, which both fell between 303 to 304 degrees. Five radians and magnetic north was 303.5 degrees in 1970. The three measurements of radians and inches (set to Magnetic North) that Zodiac suggested we use to locate his buried bomb on June 26th 1970 and July 26th 1970 can all be used in relation to the Pines postcard. The 2.19 inches from Clair Tappaan Lodge Sierra Club and the 5 radians set to Magnetic North from Donna's home or workplace, both fall inside the punch-hole on the Pines postcard.
The center of the red circle is 246.2 degrees, showing the inaccuracy of the crude drawing by Zodiac On July 26th 1970 the Zodiac stated "The Mt. Diablo Code concerns Radians & # inches along the radians" and positioned a crude black circle around his crosshairs, close to 4 radians and Magnetic North (246.2 degrees). It was clear that to locate his buried bomb we had to first use radians to locate a position around the circumference of his crosshairs and then use inches along that radian to pinpoint the target. The location "concerned" radians and inches, so the claimed buried bomb was likely to be close to a whole value but not necessarily exact.
The Zodiac Killer's measurements were probably nothing more than a rough guide in 1970, which is why he placed SFPD next to the crude circle to help us on our way. Therefore, it was quite surprising to discover that both Yuba Gap and the center of the punch-hole were situated extremely close to 5 radians and Magnetic North (at most a one degree error). The distance between the Sahara Tahoe Hotel & Casino and Yuba Gap, and the home of Donna Lass and Yuba Gap measured 6.83 and 6.86 inches respectively (an 83% to 86 % accuracy over one inch). Both distances were approaching 44 miles by crow. A distance of 44.8 miles would have been 7 inches.
The Zodiac Killer's measurements were probably nothing more than a rough guide in 1970, which is why he placed SFPD next to the crude circle to help us on our way. Therefore, it was quite surprising to discover that both Yuba Gap and the center of the punch-hole were situated extremely close to 5 radians and Magnetic North (at most a one degree error). The distance between the Sahara Tahoe Hotel & Casino and Yuba Gap, and the home of Donna Lass and Yuba Gap measured 6.83 and 6.86 inches respectively (an 83% to 86 % accuracy over one inch). Both distances were approaching 44 miles by crow. A distance of 44.8 miles would have been 7 inches.
But if these radian values of four in 1970 and five in 1971 were deliberately engineered (or that we were required to use whole radian values to locate the buried bomb and buried Donna Lass), can we therefore conclude that the Pines postcard was mailed by the Zodiac Killer? If the Bay Area murderer placed his crude circle at a position representing 4 radians and Magnetic North on July 26th 1970, then he was using radians in a manner that was flawed. They should be measured anticlockwise from the 3 o' clock position, yet the Zodiac Killer gave us a zero on the Mount Diablo map in the north position and wrote "is to be set to Mag. N", suggesting that we needed to measure radians clockwise. This appeared his intention based upon the position of the crude circle. If the author of the Pines postcard wasn't the Zodiac Killer (and the 5 radians and Magnetic North from abduction to burial was intentional), then this individual would have made exactly the same error as the Zodiac Killer by using clockwise radians from the north position. How likely is that?
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