I don't know exactly who Bea Munoz is in this story as I haven't read it. But she is likely the central character around which the ghost story revolves.
To some extent. While it's not a direct retelling of a specific true story, it incorporates elements and themes drawn from various real prison scenarios.
Partly. Wentworth incorporates elements from real-life situations and events, but it's not a direct retelling. The creators have woven a fictional narrative around real themes and concepts.