Donald Fouke stated he received the initial dispatch traveling northbound on Presidio Avenue, having just passed Washington Street, turned west on Jackson, proceeded to Cherry Street and turned left heading south on Cherry, where he met Armond Pelissetti who had just left the crime scene.
Armond Pelissetti on the other hand, after examining the crime scene stated "it was then I was told it was a white male, I couldn't get to the radio fast enough at that point to let everybody else know. The kids had told me whoever had done this crime had left the cab, went out the door and seemed to be wiping the cab down and reaching into the cab and ambling or walking down Cherry Street in a northerly direction, kind of towards the Presidio. I walked that way myself, I did not run because there are innumerable alcoves and parked cars, so I went down following every technique I knew so I didn't get my head blown off."
Remember, Armond Pelissetti receives the update of the suspect being a white male at the crime scene and gets on the radio to inform everyone else. He then proceeds up Cherry Street cautiously, after all he " didn't want to get his head blown off." It takes 1 minute to walk up Cherry Street at a normal pace, so we will afford Armond Pelissetti 90 seconds. It probably took him longer, but 90 seconds will do for now.
At the top of Cherry Street he bumps into Donald Fouke and Eric Zelms, who are naturally responding to the crime scene.
THIS IS NOW 90 SECONDS AFTER INFORMING ALL OTHER OFFICERS OF THE REVISED WHITE MALE DESCRIPTION, INCLUDING DONALD FOUKE AND ERIC ZELMS, SO WHERE WERE DONALD FOUKE AND ERIC ZELMS 90 SECONDS AGO, CONSIDERING THEY ARE NOW AT THE TOP OF CHERRY STREET.
The above portion of Jackson Street takes approximately 2 minutes to travel at an average walking speed (3.1 mph), so does it take Donald Fouke and Eric Zelms 90 seconds to travel the same distance traveling at 35 mph in a police car. This is what Donald Fouke said in the 'This is the Zodiac Speaking' documentary concerning his speed, "Before I saw him (the white male on Jackson St) I was traveling probably about 35-40 mph, slowed down as we passed him, saw it was a white male, step on the gas, 5,10,15 seconds tops."
So where were Donald Fouke and Eric Zelms 90 seconds prior to meeting Armond Pelissetti. The answer is, well beyond the vicinity of the sighting of the white male on Jackson Street and well beyond the intersection of Jackson and Maple. In fact 90 seconds ago both officers would actually be back where they received the initial radio broadcast, at the Presidio Avenue and Washington Street intersection. It begs the question, was Presidio Avenue/Washington St really where they received the initial radio broadcast of an attempted robbery of a taxicab driver, or where they actually received the amended description.
If this portion of Jackson Street was 0.2 miles, then in 90 seconds Donald Fouke would have to be traveling at an average speed of 8 mph to cover the distance. But we know his average speed was approximately 30 mph.
Traveling at 30 mph for 90 seconds, means you would cover three quarters of a mile. This would place Donald Fouke's police car well beyond the intersection of Jackson and Maple when he received the amended white male description.
This means that if we take the timeline of Donald Fouke and Armond Pelissetti as fact, as presented in the 2007 Zodiac Killer documentary, it would clearly show that both Donald Fouke and Eric Zelms both knew they were looking for a white male suspect long before they spotted him on Jackson Street and the accounts portrayed in this documentary are totally incorrect. In fact the longer it takes Armond Pelissetti to travel Cherry Street, the further back from the Jackson/Maple intersection Donald Fouke and Eric Zelms would become, when they get the updated description. The only way around this discrepancy is if Donald Fouke never traveled directly to Cherry Street. The claim of his in the 1989 'Crime of the Century' documentary that "We proceeded on Jackson Street towards Arguello continuing our search, as we arrived at Arguello Street the description of the suspect was changed to a white male adult, believing this suspect was possibly the one involved in the shooting we entered the Presidio of San Francisco and conducted a search on West Pacific Avenue, the opposite side of the wall and the last direction we observed the suspect going, we did not find the suspect," is the only viable option. In other words he searched on West Pacific Avenue and returned back to Cherry Street in 90 seconds after receiving the updated description. This is the only way to account for the 90 seconds it took for Armond Pelissetti to send out the updated radio broadcast and possibly meet Donald Fouke at the top of Cherry Street. If this is the only viable option, then who directed the two police officers into Arguello and West Pacific Avenue away from the Washington and Cherry crime scene. I will let you decide.
This is not meant to cast aspersions on the character of Donald Fouke or Armond Pelissetti, but to simply highlight that the events of October 11th 1969 could not have unfolded as portrayed in the 2007 Zodiac documentary.