Of course this doesn't mean that the identified man is the Zodiac Killer, because all we know is that the 8-year-old witness named this subject. The Zodiac Killer exited the taxicab, headed north up Cherry Street and turned eastward along Jackson Street. 3218 Jackson Street is situated five and a half blocks from the intersection of Jackson and Cherry Street, between Walnut Street and Presidio Avenue, approximately 12 minutes walking time from the crime scene.
The next task is to examine the wording on the document. Does "witness in murder of cab driver" mean that the witness was close to the murder scene in progress, or simply a witness relating to the murder of Paul Stine. It depends how you interpret the phraseology. The closer the 8-year-old witness was to the corner of Washington and Cherry Street and the taxicab itself, the more relevant this information becomes. A sighting of a man walking somewhere on Jackson Street around the relevant time period may be important, but an identification near to the crime scene, particularly around 9:55-10:00 pm that night is far more substantial.
The logical place to investigate this further, would be the residence closest and directly overlooking the taxicab crime scene -that of 3898 Washington Street. Had the 8-year-old observed the crime from here, then the child was likely only a matter of 20 to 30 feet away, adding credence to the sighting. This can be achieved by crossing residence records with ancestry, to find out if an 8-year-old child was resident at this address on October 11th 1969. This was suggested to Dave Oranchak of Zodiackillerciphers.com, who then took the baton and did an excellent internet investigation to unearth some very interesting details.
This named subject in the document cannot be concretely linked to the Zodiac Killer story, only that Xenophon Lusby Anthony was named in the unredacted FBI document.
What we do know however, is that the 8-year-old child was mentioned as a witness in the murder of Paul Stine and had to be reasonably close to the subject to confidently identify him shortly after the crime. But what the subject was doing and where he was, is totally dependent on the address of the 8-year-old, or whether the identification was correct.
Thanks to Alex Lewis and Dave Oranchak.
To further discuss this subject visit;
http://www.zodiacciphers.com/welsh-chappie---zodiac-news/eight-year-old-witness-identified-name-release
http://www.zodiackillersite.com/viewtopic.php?f=30&t=3080