This is not about having sex with underaged girls, it's about child sex trafficking, which is illegal in most developed countries. Moreover, if diplomatic immunity protects people from being charged for child sex trafficking, then we, as a so-called civilized society, need to revisit our laws.
In any event, here is the alleged child sex trafficking victim's affidavit: Exhibit 1 (PDF)
But he isn't the one doing the trafficking, so he would not be responsible.
In any case I find that account in the affidavit dubious. According to her all this started when she was 15 and continued until she was at least 17 (and we can presume longer). That is a long time, and presumably she would have seen clients many time in that period. Yet she can remember individual details about who, when and where she did all these things. That is not credible. Did she take notes while this was going on, and if so, were they presented as evidence? She talks specifically about a small number of particular people and does not mention more general things about these years. IMO that is characteristic of a fabricated story. Remember, her suit is not against these named individuals, it is about her experience in general, but the emphasis is not on that, instead she focuses on these individuals. She claims that when she first went to the mansion, her father was not allowed in. Did this not seem odd to anyone, considering she was 15 at the time? If what she is saying is true, then her family must have been colluding with it, otherwise it does not seem reasonable. Then she claims to be forced to do these things. If she was forced, then why would she be being paid these large amounts of money? $400 net for a client is pretty good money for an escort, and very, very few of them ever get paid $15000 to see a client. Money like that is the absolute pinnacle of the escort world. She is being revisionist IMO, she was not forced to do anything, she was doing this for the money. She suggests that she got paid so much to see Andrew because that somehow would give Epstein a hold over him, BUT, this was in England where having sex with a 17 year old is NOT illegal, not to mention that unless a recording was made of them having sex it would be impossible to blackmail him anyway. So how would her having sex with him one time be worth $15000, but another time $400? That does not make sense at all. Her account and rationale of that is simply not credible.