by Norse » Sun Aug 16, 2015 6:13 pm
Well, it has to be a like-for-like comparison. You need, say, two right index finger prints (that are both good enough), or two palm prints (which are good enough) in order to make a comparison. The only Napa print I've seen which has been considered a possible Z print is the infamous "moist" palm print. So, even if that print is a good one (which is probably isn't - because Snook made a mistake when he lifted it) you'd need a good palm print from the cab to compare it to.
The SF prints which the cops believed to be Z's (the "bloody" ones) might have been compared to the whole batch of Napa prints for all I know, but I can't confirm that. A match was clearly never found if they were, however - which of course proves nothing, because - as I said above - most of these prints are useless, in the sense that they're obviously not Z's (a public phone booth is bound to be covered in fingerprints).