If and when you do work on the Criterion audio for The Killer, the only things I see that need addressing are the very few pops that cause some dialogue or sound interruption (I think there's like 3-4 of these max) but more importantly there's a high frequency hum that goes through at least 3/4ths of the film. It is sometimes drowned out by the soundtrack but definitely there. I checked my own CLV disc and it is there as well, so it is indeed something inherent in the transfer or source material.