Exploration

The first thing confirmed about the prison was that it wasn't a normal, conventional prison. What was abnormal and unconventional about it? Maybe there were too few lights and no surveillance cameras. Put bluntly, no matter where it was, a public place without cameras might be understandable, but having so few lights that one had to feel one's way through the darkness was far too abnormal. It was as if it had been deliberately created for the murderer...