This suggests the fingerprints must have been deposited at another point in the timeline, but equally unlikely to have been at the Washington and Cherry Street intersection. Had he shot Paul Stine at this location, he would have exited on the street side, the rear right passenger door, and entered the front right passenger door, keeping deposited fingerprints to a minimum, if he was not wearing gloves. He was first observed by the three teenagers in the mid to passenger side front of the taxicab, lending credence to this order of events. Had he been wearing gloves when he initially entered the taxicab, then he must have removed them at some point in the journey, possibly to facilitate his operation and control of the weapon.
If as we speculated in the article http://www.zodiacciphers.com/zodiac-news/presidio-heights-the-final-chapter he had shot Paul Stine performing a run through stop at the Washington and Maple intersection, with the taxicab motioning forward out of control, then he had every reason to react quickly via the shortest route, by exiting the left rear door and depositing fingerprints on the exterior driver side door, before clambering over Paul Stine and regaining control of the vehicle. If this scenario is correct, he was not wearing any gloves at this point, because there would have been no reason for any fingerprint removal at a later time. His wiping down of the taxicab also appears to negate his claim in the Bus Bomb Letter of wearing transparent fingertip guards, which would have been rendered useless by the wearing of gloves.
He removed the wallet and keys to keep his fingerprints from the evidence room, he wiped down the interior and exterior of the taxicab, yet we assume he inadvertently left a pair of black leather gloves sitting in plain sight. If he placed them there as "fake clews", then in doing so, he risked placing fingerprints upon them as he did so, unless they were brand new and carried to the scene in a sealed container, before being dropped. However, any contact with these gloves prior to October 11th 1969, may have still proved evidentiary.
The Zodiac Killer in all his actions, removed items from the scene for a logical reason, they may have harbored fingerprint evidence. Leaving items for recovery seems an unlikely option.
The eyewitnesses at three of the crime scenes, describe the Zodiac Killer as heavyset, between 5'8" and 6'0" in height, yet these gloves were men's size 7, which by most recognized standards, is extra small. The correlation between hand size and height is statistically significant and fairly linear. Generally people with bigger hands are taller. If you look at the hand span to height chart here, measuring a number of individuals, it becomes apparent that an individual of at least 5'10" or 70" in height, has a hand span in excess of 20 cm or 7.87 inches. A perpetrator with size 7 gloves or hand span of 17.8 cm would generally fall in the shorter category. If you look at the hand spans below 20 cm, in the range of 17.8 to 19.0 cm, it shows heights of 62, 65, 68, 64, 68 and 64 inches (between 5'2" and 5'8"), all below the general consensus of around 5'10" for the Zodiac Killer. It must be stressed however, that this can only be used as a guide, and could not be used to eliminate the Zodiac Killer as the owner of the gloves. Just make it improbable.
The actions of the Zodiac Killer, described by the three teenagers, seemed to suggest the Zodiac Killer was wiping away his fingerprints from the taxicab. The Zodiac Killer himself stated in the 'Bus Bomb' letter mailed on November 9th 1969 "As of yet I have left no fingerprints behind me contrary to what the police say, in my killings I wear transparent fingertip guards. All it is is 2 coats of airplane cement coated on my fingertips -- quite unnoticible + very efective." Either way, it is unlikely he ever wore gloves.
Robert Graysmith described this in his book 'Zodiac', “Just under the dash, Toschi found a pair of dull-black leather gloves. They were soaked with blood but were too small for a man. Later he discovered that they belonged to a woman passenger from earlier in the day.” The previous fare had journeyed from Pier 64 to San Francisco Air Terminal, on a mild October night of 59 degrees. Possibly they were traveling to colder climes.