It can be strongly argued that this was the time given for his arrival at the field beyond the Gate #10 turnout, not the time he was leaving to go home. In other words, he went to check his sheep at 10pm and noticed the white Chevrolet Impala when he entered the turnout gate. I sincerely doubt that Bingo Wesner had traveled to his place of work that night, entered the double-sided gate, drove up the dirt road and parked up, left his vehicle and traversed the extensive field checking his flock of sheep, before returning to his vehicle and leaving Gate #10 in just 15 minutes. Although not impossible, it isn't realistic.
One of the eyewitnesses that night was Helen Axe, who described seeing the Faraday Rambler and the victims inside the vehicle, which was facing in towards the gate at 10:15pm as she and her boyfriend headed towards Benicia. Upon their return at 10:30pm, they again noticed the Faraday Rambler, which had now turned around and was facing the field. If this really was the Faraday Rambler, it's safe to assume that David Faraday and Betty Lou Jensen remained in this position until Peggy and Homer Your spotted them at 10:55pm when they went to check pipes at the Marshall Ranch. They described the Rambler facing the field. Therefore, we assume that the Rambler was still in the same position as last seen by Helen Axe. However, if Bingo Wesner arrived at the Gate #10 turnout that night at 10pm to check his sheep and had spent longer than 15 minutes performing his duties, by the time he left, he almost certainly would have seen the Faraday Rambler in the turnout. But he didn't. On the other hand, if Helen Axe had seen the Chevrolet Impala in the turnout at 10:15pm and 10:30pm, which was turning around to leave at 10:30pm, then when Bingo Wesner had finished checking his sheep that night and had left at the more reasonable time, somewhere between say 10:35pm and 10:50pm, he quite possibly would have seen no vehicles in the turnout. It must be noted that he made no mention of any vehicles in the turnout as he left to go home
Ray Grant's assertion that Helen Axe's sighting of the Rambler was a case of her reading the newspaper reports of the murders and placing the Faraday Rambler in the turnout instead of the Chevrlet Impala, effectively interjecting herself into the case, now seems likely. If so, we now have a Chevrolet Impala arriving in the turnout sometime before 10pm and leaving at 10:30pm, or slightly after. We have somebody vacating their vehicle for upwards of 30 minutes on a freezing cold night, just 40-45 minutes before an unknown vehicle parked alongside the Rambler of David Faraday and Betty Lou Jensen, carrying an occupant with murder on his mind.
RAY GRANT'S ROAMING CHEVROLET IMPALA
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