Why did Jerry Sandusky do that interview with Bob Costas?

It starts off very badly. I hear a man who is not committed to confident lying or confident truth-telling. He sounds like he's accessing his memories and filtering what we receive.

"Well, I could say that, you know, I have done some of those things. I have horsed around with kids, I... I have showered after workouts. I... I have hugged them and I have touched their leg... without intent of sexual contact, but, um... uh... so if you look at it that way... uh... there are things that... uh... wouldn't... uh... would be accurate."

After hearing that, I wondered why exposed himself to an interview, why his lawyer let him do that. But as the interview continues, including contributions from the lawyer, I think he does in fact get himself into a better position that where he was before we heard that... assuming we listen to the entire 8+ minutes. He ends:

I don’t know what I can say or what I could say that would make anybody feel any different now. I would just say that if somehow people could hang on until my attorney has a chance to fight, you know, for my innocence, that’s about all I could ask right now. You know, obviously it’s a huge challenge.