
If you take a close look at the shirt below (the red rectangle), you will see the likely point that the Zodiac Killer began his cut that night - on the left side of Paul Stine's body and shirt (which was his nearest accessible point). The killer likely pinched the shirt and pulled it upwards with his fingers on the left side to began his cut through the front and back of the shirt at the same time. In other words, he cut through two layers of fabric simultaneously. Why else would there be a cut on the front right side? (as viewed in the below left image) Once he had made this initial cut, he probably repositioned his left hand (pulling the back side of the shirt upwards to create tension) and then cut out a rectangular piece of the shirt from the back left side towards the right side of the shirt rear, In the image below the man's left hand is not positioned next to the back of the shirt, because this part of the shirt was removed by the Zodiac Killer. His hand is positioned by the left inner front portion of the shirt. In the black and white image below, it would be the backside of the right front as we view (the section with the label on). I have placed green arrows showing two matching areas of blood staining from the inner and outer lining of the shirt front. Their size slightly altered because of how the shirt is layed out The blue circle and blue square both show the same front section of the shirt.