This Judge chap is trying to create distance between himself and the allegations against K.
All sounds a bit like a conspiracy of silence for K's sake. But it could be something a bit more like he knows his memories aren't precise enough to withstand detailed questioning, and he wants to avoid the embarrassment. Or he thinks he is at risk and simply doesn't want to provide ammunition which can be used against himself.
So one may not assume K is guilty merely because Judge is silent.
Either way, I think the Republicans must at least postpone the nomination while a non-partisan investigation occurs.
This is why you have such investigations. So that the partisan evidence development process seems trustworthy to everyone. The GOP only has itself to blame.