Why were they trying so hard to hide his involvement if they thought he had paid his debt to society and everything was all good? Clearly they knew this dude was toxic but still wanted his money.
Blackmail is illegal, by the way.
At this point it's pretty clear that he made most of his money through blackmail of underage sex acts arranged by him. He pretended to be some kind of hedge fund genius, but really most of the money that his targets gave him to keep the pictures out of the press just went into index funds etc. IANAL, but that doesn't seem legal to me...
https://www.cbsnews.com/news/jeffrey-epstein-worked-at-tower...
His entire past is super shady.
B) You can't declare "blackmail payments" on tax forms. Any ongoing blackmail arrangement between wealthy people has to plausibly appear to be something else. Money management is something else. Blackmail targets gave him money to manage. His fee was probably higher than e.g. Vanguard's, and it probably changed whenever the Lolita Express needed some maintenance, but he didn't take all their money.
C) This "proof" idiom is ridiculous in this context. We'll never have any "proof" that he was murdered, but neither do we need that. [0] The fact that a medical examiner didn't have to call it "murder" just shows that he was murdered by a competent hitter.
[0] http://www.rasmussenreports.com/public_content/politics/gene...