According to New York city mayor Bloomberg, investigators bought guns in private transactions at an Arizona gun show, despite their having alluded to being unable to pass a background check.
Such sales between individuals are not subject to background checks – but private sellers cannot legally sell to individuals who might not be able to pass background checks otherwise. That makes the seller – and the purchaser – guilty of felonies. Accordingly, anyone party to those illegal purchases (as in the mayor who sent them undercover with the intent to make an illegal purchase) an accessory.
So, let’s start the real prosecution.