If the figure of 1767 guns is the total unaccounted for since 1970 that amounts to 49 per year. I have shopped at Traders. It is a major gun dealer in the East Bay and has been for many years (the first time I went there was in the early 60's). I don't know how many guns they sell each year but I would be willing wager that 49 is a very tiny percentage of the total and could quite easily be attributed to "human error". That some of the guns sold by this place wind up used in crimes should be no surprise given the fact that it is one of the few large gun dealers still in business in the area and that they have sold many thousands of guns over the years. A more interesting statistic would be one showing what percentage of the guns sold by Traders have been used in self-defense against criminals.
"...given the fact that it is one of the few large gun dealers still in business in the area..."
Now we know why the ATF is working so hard on this case.
It would also be interesting to find out what fraction of those "crime guns" were used by the person who the shop sold them to, rather than having been stolen from the buyer.
Also, what percentage of the firearms used in crimes traced back to the dealer were reported stolen prior to the recovery by the police?