You have proof of Apple's being complicit in the price-fixing scandal? I thought that was going to be determined by the courts. But since you already have it settled, I guess the DoJ should contact you for your insight into this case. As for the 30%, that's the distribution fee Apple charges for participating in its online store. It's the same cut for books, apps, etc.
When I read SJ's memos to the publishers about set prices and when I see 4 or so out of the 6 of them having already settled, I think I can make a rather good guess if they were or were not complicit. I don't need to have a case settled to form my own opinion if what is alleged did or did not take place.
The 30% cut in the app store does not imply pre-set book prices by publishers in tandem. If apple wanted to go with the agency model they should have managed the % cut on a per book basis according to their store management and not opt to allegedly collude with publishers to ensure both their 30% and higher profits for the publishers and make an illegal trust move against a competitor whose model of business is based on discounting books.