I went to the prison I cleaned everything and covered the entrances with cars so that it was impossible for the enemies to enter, A week later and a few days (game time) I returned spawned I think some enemies (Outside the building but inside the walled area of the prison inside the building was totally empty nothing had appeared there) so I killed the enemies that were actually quite a few I went to sleep in a cell and when I woke up the whole prison was full of enemies totally reappeared the prisoners were literally hundreds of the overnight I think this doesn't make much sense or realism since they appeared while I was sleeping inside the same prison overnight miraculously escaped running crouched among a horde anyway hopefully a solution to this would be found