The narrative my mind generated (and it is just a narrative) is that some entirely normal person whose job or circumstances gave them access to Epstein, looked at him, decided he was guilty and that a billionaire like him would never face justice, turned the camera(s) off, and took justice into their own hands.
I have no evidence for this, and don’t want to even imply it’s more than my imagination.
The thing is, high profile prisoners have a whole system set up to prevent a single individual getting in close like that. (Or were supposed to. You'd think they learned after Oswald!)
Sure, but it’s not like software is supposed to be hackable either, and if physical security is like digital security the guards probably have a long list of issues they told their bosses about years ago and about which nothing has been done.
I have no evidence for this, and don’t want to even imply it’s more than my imagination.