Then we have Peggy Your, who claimed she saw the young couple in the car, even describing their movement within the Rambler. She passed the turnout before both James Owen and Stella Medeiros, which creates a further problem. From Peggy Your, to James Owen, to Stella Medeiros, the young couple apparently vanished and then reappeared on the gravel turnout, because James Owen saw nobody "in or around the cars." If they were not "in or around the cars," where the hell were they?
Raymond Grant went on to say "The other two witnesses, Robert Connley and James Owen, said there was no one in or around the vehicle(s). One's headlights do NOT shine into the turnout when one is coming from the east, driving west. Peggy Your could only have been right if Homer had had his high beams on, in which case they would have hit the driver door window, which was up on a night with the temperature at 22°. So the high beams hit that window for a split second and bounce off, and how does Peggy make out what the teenagers inside that closed window were doing from 350 feet away?
Peggy thought she saw the victims, just as Helen Axe thought she saw the Faraday Rambler when she went by at 10:15 pm. She didn't. But she knew she'd seen a car parked in the turnout, knew the victims were killed there, and somehow her mind just assumed she'd seen the victims moving around inside as she rode by. This phenomenon is called a false or self-generated memory, and it happens all the time to witnesses in criminal cases trying to remember what they saw.
One of the more recent examples is that people watching news coverage of the September 11th attacks believe they saw the North Tower fall in real time. They didn't, because the video feed was showing something else as Tower 1 collapsed. What people saw first was the smoke and debris of the aftermath of the tower's collapse when the cameras cut BACK to it. The networks then showed a replay of the tower falling, but the first thing people saw was the aftermath."
From the perspective of a single shooter theory, we are left with the Zodiac Killer drawing up alongside the couple at some point during the late hours of December 20th 1968, exiting his vehicle and forcing the couple from their Rambler, before shooting them in cold blood.
Yet, if neither Robert Connelly or James Owen spotted anybody "in or around the cars," just minutes before the murders and they were not being held under duress out of sight or between the vehicles, it opens up a whole range of new possibilities.
James Owen claimed he heard a shot about a quarter of a mile past the turnout, which traveling at approximately 30 mph amounts to about 30 seconds. If this were true, it puts David Faraday, Betty Lou Jensen, and the killer or killers back in the turnout.
This would also pour doubt on the couple being held under gunpoint, out of sight, in their own vehicle. For this to be the case, not only would Zodiac have closed his own driver side door (as stated earlier), but once James Owen had passed by, he would then need to have forced the couple to exit the Rambler from within, closed the doors of the Rambler and started shooting. This would then negate the idea of warning shots being fired into the headliner and rear window of the Rambler to initially drive the couple from the vehicle. Totally unnecessary if you are already in the Rambler. The pattern of events is debatable, but my guess is at least one or more of the eyewitness statements are factually incorrect to make sense of Lake Herman Road in the December of 1968.