Does Charles Latimer ever learn anything that explains Dimitrios's criminal nature? Why might Dimitrios be such a hardened criminal?

How does Mr. Peters explain away or apologize for his criminal behavior? Does Mr. Peters really believe the philosophy he espouses and discloses to Latimer?

Why does Charles Latimer agree to help Mr. Peters blackmail Dimitrios? What could Latimer have done instead?

Why is Charles Latimer so interested in finding out about Dimitrios? What is his motivation for investigating the criminal?

Will Charles Latimer be able to go back to his normal life as a mystery writer? Has his experience investigating Dimitrios changed him at all?

When Latimer leaves to get the police, does he know on some level that Mr. Peters is planning on shooting Dimitrios? What other choices does Latimer have at this point in the story?

Is Dimitrios admirable in any way...