In the 1969 DOJ report it states "Subsequent to September 27th 1969 481 suspects have been eliminated as a result of investigation, handprinting and latent print examinations compared with latents relative to the Napa County and San Francisco homicides."
We know suspects can only be eliminated using fingerprint analysis, by comparison of their prints to the blooded fingerprints on the taxicab. The un-blooded fingerprints on a public payphone and public taxicab are not necessarily the killer's, so couldn't be inextricably linked as being donated by the killer. Therefore to eliminate a suspect, as stated in the above DOJ report, it can only be done by comparing suspects to the blooded prints from the taxicab. This in theory links the killer to the murder scene, having been in contact with a bleeding Paul Stine. However the above report clearly states "suspects have been eliminated with latents relative to the Napa County and San Francisco homicides," when only the blooded taxicab fingerprints are required to achieve this. The Napa payphone prints 1 through 35, could have been donated by any member of the public, so why include these in your elimination process. The above may as well have read "Subsequent to October 11th 1969 suspects have been eliminated as a result of latent print examinations compared with latents relative to the San Francisco homicide." You can only exclude suspects from the October 11th 1969 fingerprints, so why include the previous Napa crime, unless they had a match from the taxicab to either the Napa payphone or Karmann Ghia. This could then certainly eliminate suspects as the killer.

