
In a previous article a new timeline was examined courtesy of Zodiac contributor Jibberjabber, where the Zodiac Killer left the car door at about 6:07pm and walked 0.8 miles north, to be spotted by Dr. Rayfield & Son at around 6:30pm by Smittle Creek Day Use Area (where the "voyeur" was spotted by the three women earlier that day). "Dr Rayfield stated that about 6:30 pm the previous evening (September 27th), he and his son had parked their car north of Park Headquarters and noticed a white male adult subject walking in the area, described as about 5'10", heavy build, wearing dark trousers, a dark shirt with red in it, long sleeves". If this was the Zodiac Killer, I suspected that he may have been walking back to his vehicle just north this location, about 2 minutes journey time to a turnout. This would have had him entering his vehicle at around 6:32pm.
The Zodiac Killer would have been aware that 34 minutes had now elapsed since he left the scene of the double stabbing (5:58pm), and knew the location of Park Headquarters, just south of the crime scene. He may have thought it unwise to head south, back towards the crime scene and Park Headquarters in possession of the gun, knife, costume, and possibly with blood transfer to his clothing. The logical choice under these circumstances may have been to travel north towards Pope Canyon Road and Pope Valley, and then head south on Chiles Pope Valley Road (built between 1845 and 1846). The Zodiac Killer would then pass Lake Hennessy and take the Silverado Trail towards Napa. The journey time from his vehicle to the payphone via this route would be about 67 minutes after entering his vehicle at 6:32pm. The Zodiac Killer would have arrived at the payphone in Napa at 7:39pm, one minute before the phone call was logged at 7:40pm. So was this the Zodiac Killer spotted by Dr. Rayfield & Son?