BB, a regular contributor to this site, pointed me in the direction of a 1995 'Great Crimes and Trials' video about the 'Zodiac Killers' which included the statement below. As with many Zodiac documentaries it contained a fair degree of elementary mistakes, but one such statement in the documentary had a ring of truth about it. At the very least - bearing in mind the missing bullet - this statement caught the attention. It is not unusual to see errors reported about the Zodiac case, however, in this instance the narrator seemingly conjured up an entirely new 'fact' about the October 13th 1969 Paul Stine letter never heard before.
The documentary stated:
"But any doubts about the killer's identity were dispelled the next day when a letter from Zodiac arrived at the San Francisco Chronicle. With it was a bloodstained piece of the driver's shirt and a bullet from the same pistol that had killed Jensen and Faraday". Had the Zodiac Killer walked towards the stricken Betty Lou Jensen to check on her status and retrieved a bullet from the turnout floor for 'future use"? This may explain why only two of the three exit wound bullets were recovered from Betty Lou Jensen at the crime scene. The police reporting of Presidio Heights was less than transparent in the aftermath of the Paul Stine murder. It wasn't too difficult to confirm that the bloodstained piece of shirt came from the corpse of the taxicab driver, but if a bullet had also been mailed with the letter, this would require interdepartmental cooperation from police involved with the murder of Jensen and Faraday to run a ballistics check. This may be the reason the details of the bullet were withheld from the newspapers until confirmation was acquired, or left out altogether. The police have openly admitted some evidence has been withheld from the public domain.
Tom Voigt made a good point regarding the Lake Berryessa attack on the Zodiackiller.com message board, stating "I've always felt that Zodiac might have written a letter regarding the Berryessa attack, perhaps to the Napa newspaper, and since it wasn't printed (for whatever reason) he decided to include physical evidence in future letters".
When Vallejo Police Chief Jack E. Stiltz asked the Zodiac Killer for more proof that the letter writer and killer were the same person in the August 3rd 1969 Sunday Examiner & Chronicle, the Zodiac Killer could have supplied the bullet at this juncture, but as we know, the Zodiac Killer didn't always play by the rules. This may point to the fact that the killer had a broader agenda and always intended to kill in San Francisco. There had been a spate of taxicab robberies in San Francisco in the months prior to the Paul Stine murder, so by inserting a bullet from the murder of Betty Lou Jensen and David Faraday into the October 13th 1969 letter, this notion or connection would be completely dispelled. The narrator in the 1995 'Great Crimes and Trials' documentary may have made a gross error in statement, but to add to the Stine letter "a bullet from the same pistol that had killed Jensen and Faraday" from thin air, considering the missing bullet at Lake Herman Road, begs the question nonetheless.