I have never bought into anything resembling a conspiracy theory. But in this case I find it nearly impossible to believe that this was a simple suicide. Epstein was one of the most high profile prisoners they had. Apparently he attempted a suicide (or was attacked) just days ago. Surely he would have now been held under the most rigid watch/protective custody conditions possible. How on earth could he commit suicide by hanging under those conditions?
Further, whatever the truth of any of the specific allegations swirling around him there is no doubt that he was an enormous embarrassment to much of our criminal justice system and probably a substantial threat to many important individuals. A large number of people are breathing easier with him dead than when he was alive, some of whom are politically powerful and some of who work within the police, court, and incarceration systems.
It is hard not to see this as the classical organized crime meme "Perhaps he could have an convenient accident?" I am not convinced that he was murdered directly by someone in authority, but perhaps he was knowingly permitted to commit suicide or to be attacked by another inmate. IMO right now: less than 1 chance in 10 that he willingly committed suicide despite the wishes and actions of the prison administration and staff.