Well, unless you get taken to prison where you will be surveilled, but the surveillance will fail at exactly the moment you committed suicide, mysteriously, and all footage would disappear after a technician makes an innocent mistake while backing it up.
Correct, and the events that user described is exactly what happened to Jeffery Epstein, and yet somehow we have no public information about who is responsible, and the official story is suicide.
But is it? What kind of foul play - is it prison management hiding the fact they had somebody kill himself on their watch (which is professional incompetence), or the other one?
Or, non-conspiratorially, surveillance fails all the time, but no one cares or even knows if surveillance fails and there was no reason to go back through the footage.
You can't. That's the job of the prison. This is why people get upset when there is a "CCTV malfunction" when high profile prisoners supposedly kill themselves.
