Could "de" (or "da") work here? Those are all still sort of foggy for me
No, only "el" could work here.
Why is that?
When you mean an element of some set you should always use "el". One particular jail is an element of the jails set
That's very helpful, thanks!
Richardson says karcero is an individual jail cell, while "a jail" in English usually refers to the whole building. So shouldn't that be either karceraro or karcerujo or something?
There is a one more dot in the end of the sentence