It’s not that clear cut. Ignorance is no excuse, if she was underage in whatever state they were in, then unless he asked her specifically and she lied to him, then saying ‘I didn’t know’ doesn’t clear him. As for the trafficking, the prosecution are obvs going to try and maintain that he knew fine well what Epstein and Maxwell were doing, and his visit to Epstein’s mansion after his release from a sentence for noncing a 14 yr old in which he did a please deal for a further 36 underage girls to be included, is a pretty good indication that he both knew and didn’t have a moral issue with it.