I expect him to say that he doesn't regret it, it hasn't harmed his athletics at all etc.
First I would have denied it though and said I was fucking around with some mates, we took a picture of me with a bong or something. He's a moron obviously, anyone else would deny it, the picture doesn't even look like him.

Anyway, stuweed224 write a letter to him saying this, it's much more productive then putting it here.