From the Mueller, She Wrote tweet on pg 66 (of this thread), tweeter displays a document discussing "Dershowitz (along with other members of Epstein's defense team)" and the secret immunity provided when reaching the deal in Florida.
Ken Starr, deader than a doornail now, was one of those 'others' on the defense team and, as low of an opinion I have of him, when he died a lot of secrets died with him. They could talk to Starr's former deputy, Brett Kavanaugh (not directly involved AFAIK with Epstein's defense as I think he was a sitting judge at the time), but yeah, ha, like he would say anything when asked, enrobed egoist asshole that he is--he's smart enough to know better. He's got his gig and he ain't losing it now. Ironically, the right leaning media outlets roasted what they perceived to be the cossetted treatment of Epstein as compared to what they believed to be the persecution of Kavanaugh during his confirmation. Well, yes right leaning media outlets you got the cossetted treatment of Epstein correct but you're missing the big picture per usual.
Edit to add: The power players (mostly men, some females, and grasping enablers) swing their boy (or girl) bits around seeking gratification without concern for political parties until it is erm exposed and the information weaponized. But it's a mirror to our society that we do not honor the meek nor protect the victims or disable the structures that permit the atrocities perpetrated against the powerless. Sucks to our assmar I guess.