An FAA friend told me that the tower was really upset. It was written up and sent via the State Department to the Korean equivalent. Nothing came of it. KAL could do no wrong.
Yeah. It gets complicated because many countries prohibit domestic legal action based solely on foreign evidence / investigation by a foreign country. It gets into due process, sovereignty, etc.
I'm going to correct myself a bit: I've been told that Canada is a "special case" and the FAA has a "direct line" to Transport Canada for referrals (so the State Department doesn't have to get involved). However, it would still be Transport Canada's decision to pursue the matter further or not.