Alexander Acosta (prosecutor against Epstein in 2007) made a cryptic remark that Epstein "belonged to intelligence" and that he was told to leave the case alone.

This remark, along with the soft plea deal he got have created a lot of speculation (mostly outside of mainstream news outlets, for obvious reasons), that Epstein was operating a blackmail honeypot for some intelligence agency, either the CIA or Mossad I guess, since he had some ties to the Israeli defense industry and some former high-level Israeli politicians.

It's honestly not that implausible that an intelligence agency would let him keep his pedo ring as long as they knew who was in it, it would have been a blackmail goldmine based on the kind of people that were in his social circle.

Here is the source of the quote and some more information on his ties to Israeli intelligence if this interests you:

https://en.wikipedia.org/wiki/Jeffrey_Epstein#Financial_cons...

https://en.wikipedia.org/wiki/Jeffrey_Epstein#Israeli_startu...