One of the nice things about the email non-paper trail is that there are no fingerprints... literally.
What proof does anyone have that Rush sent the alleged emails. They may have been sent from his Macintosh, but what proof is there that someone else, perhaps a household servant, like, possibly a maid, who would have had access to the computer while Rush was on air? If Rush was being set up, this would be the way to do it.
Didn't I read that a hard disk drive was removed or backed up? What did they do, swap it out with an empty drive, or just clone via FireWire, etc?