> would he not arrange so it would be sent out in case of his death?
Not being able to do that while in high-security confinment.
> And what stops the victims of naming names now?
Not wanting to die.
> what would have stopped Epstein of just not talking and just denying?
The only way to be sure he would not talk is to definitely prevent him from talking.
Now I'm not saying the murder hypothesis is the correct one, but it still holds water IMHO.