I'm being a dunce about US law here, but which bits would actually be illegal in Epstein's actions?
If he has raped someone of any age – had sex without their consent – then obviously that's illegal.
But given many states in the US permit marriage of girls under 16 and some have no lower limit at all, would Epstein having sex with a girl under 16 necessarily be legally rape? Does it depend on the which state it happened in?
(IIUC, if he'd had sex in the UK with a girl under 16 she would be deemed not able to consent and it would legally be rape.)