He denied it in textbook politician "I have no recollection" fashion. That's hardly accepting it. He had no option but to accept his DQ.
It's not the end of the story.
His reputation amongst his peers is gone forever. Shattered. Lost.
Why do you think I am thinking he should get an extra penalty? I didn't say that.
He will get what's coming to him, whatever that may be.
The "mental error" was not realising the cameras were on him. He thought he would get away with it. The most blatant example of cheating you will ever see.