A tremendous part of me wants to agree with you. From the outside this seems like guilty behavior and it's easy for us to say "if I were innocent I'd welcome any investigation." But with just a bit of empathy of Kavanaugh's position, I can understand great reluctance to willingly go down this route, something he did not sign up for when agreeing to these hearings. The investigation is going to draw out this entire ordeal which is already having a disastrous toll on his family, career, and reputation, without any actual evidence other than viral soundbytes.