However, Bingo Wesner was also quoted as saying that "last night he was checking his sheep at approximately 10:00pm (east of the Benicia Pumping Station) and he observed a white Chevrolet Impala Sedan, parked by the south fence of the entrance to the pumping station. He also observed a red Ford pick-up with wood side boards in the area (the pick-up was later identified as the one Frank Gasser and Robert Connelly were riding in)".
The testimony of William Crow, who stated he was in the turnout with his girlfriend between 9:30pm and 10pm, was unable to be confirmed by an impartial eyewitness, so we cannot be certain whether his version of events are correct. Regardless, in a much later statement he claimed "I never told the sheriff who interviewed me that the car I encountered was a Valiant. As I recall, as I was attempting to describe the car and the sheriff came up with a “Valiant”. In the years that have passed, when I have shared the events of that night, I have described the car as a four-door light-colored Chevy. I could not see the passenger seat, but the driver was a man with short hair and glasses. I did not see his specific facial features". His earlier statement on December 22nd 1968 described two subjects "who were both Caucasians".

If Ray Grant is correct that Robert Connelly, Frank Gasser and Bingo Wesner saw the empty white Chevrolet Impala facing south towards the gate at 10pm, then it is extremely noteworthy that Helen Axe saw a tan-colored vehicle also facing the gate only 15 minutes later (that she believed to be the Rambler). The 1959/1960 Chevrolet Impala was made in "ermine white", which when viewed in the headlights of Bingo Wesner exiting gate #10, would have looked off white, but when viewed in darkness, such as by Michael Mageau at Blue Rock Springs, it would have appeared tan-colored or light to medium brown (which is how he described the vehicle). Therefore, if Helen Axe saw an "ermine white" Chevrolet in the turnout in darkness, she could have easily mistaken it for tan-colored or light brown, just like the Rambler. The 1961 Faraday Rambler was two tone, dark tan over light tan. Ray Grant has stated that Frank Gasser had approached the Chevrolet Impala in the turnout and illuminated it with a flashlight (so would have moticed its white color). He and Robert Connelly, after they parked up at the Marshall Ranch about 10pm, had walked by Sulphur Springs Creek and the turnout on their way towards Benicia Pumping Station and the Dotta Ranch for a spot of raccoon hunting..
So was the Zodiac Killer (or Zodiac Killers) driving an "ermine white" Chevrolet Impala around on December 20th 1968, cruising between Lake Herman Road and Blue Rock Springs Park looking for victims, the latter which he would murder for a third time just over 6 months later?
RAY GRANT'S ROBERT CONNELLY TIMELINE
THE CONNELLY AND GASSER SIGHTING OF THE CHEVROLET IMPALA WAS 9PM
HUNTING BY THE BENICIA PUMPING STATION
CONNELLY AND GASSER NEVER SAW WESNER
WAS THE HELEN AXE SIGHTING WRONG?