I'm not sure about that. I get the feeling that whoever is trussed up at the end will stand for, but not be an owner of, the sort of institutionalized malice that has let all these things happen. Like, the mystery itself will be solved, but the kind of environment that let it fester won't be, and we'll see few answers beyond the immediate who-done-it. More importantly, I don't think Rust will be satisfied by whatever answer is found at the end, because the thing which he sees and takes aim at - and has tracked all these years - is the background noise, the complacence of men who have participated in or let these crimes happen, and it's something that can't be tackled by one man alone.