Compliance, compliance, compliance. Always ask Compliance. Tressel messed up because he kept eligibility-affecting information to himself; he was under no obligation to this "concerned party" to maintain the confidentiality that was requested, and he was in fact obligated to share the tips regarding his players to the department. Tressel even emailed that he would look into it, and if he did so, that apparently didn't include Compliance.
I definitely stand with Tressel, but he made an error on this one, so he's got to take his medicine--and fortunately he's got bosses who stand with him too, so once the price has been paid it's back to the job of being a head football coach. And right now, Tressel isn't hiding from this, the university seems to be doing the right thing in terms of self-reporting and compliance, and eventually life will return to normal. And so forth.