You might oughta slow down a bit there, FRiend. So far the evidence that there is any crime for anyone to be an accessory to is pretty thin. And there seems to be a presumption of guilt on the part of some members of the Duke community. If my son was a part of this party, I'd ask him if he was part of any rape or saw any rape. If he said no and no I'd probably advise him to say nothing to anybody and let the police and the D.A. make their case. In a situation like this I'd be worried that some of these guys might get railroaded with major charges over some tiny infraction just so the University and the cops can get the PC nazis off of them.
I suspect that you'd give your son the same advise if the answers were (no and yes) or (yes and yes).
I should really know better and dispense with the legal lingo that I hear on Law and Order.
lol!