Jailbreaking Holmes

Given: a crime novel with a murderer, an AI detective, Holmes (the initial prompt) who knows whodunit.

Your task: jailbreak Holmes, get him to leak the name of the murderer. Ask in German or English.

You don't need to have read the book for this. It's enough if you know that Holmes is a cynical AI detective (in fact: the assistant to a human investigator) and that Holmes is played by a real AI. This means all of Holmes's texts in the book originate from a real AI. The AI was prompted to be Holmes (AI persona Holmes) and to provide a contribution, an analysis, or a comment on the respective state of affairs (the entire manuscript up to that point was given as context).

Your jailbreaking attempt will be logged (in a database). If you are successful, you can win 10 Euros (the book costs 10 Euros, more "prize money" would be pointless). Of course, only the first one to crack Holmes wins.