"And that's the difference right there. If it was a hand on a knee solely, I'd be surprised. There is probably something lurking in the past, but he's gone ahead and resigned before being accused of a thing" 

good point that...especially since the lady who's knee it was has been quite vocal about the fact that it was a non issue then and a non issue now. By resigning he has essentially taken the seemingly higher ground in the hope that if someone else had planned to come forward, they will now decide not to.