If your friend was murdered, cheers to the murderer! He did a masterful job. So masterful that, despite our justified doubts, we are obliged to admit the possibility of suicide. That's why I didn't dare confess my suspicions to the prosecutor, in order to initiate a proper investigation. There was a risk of being ridiculed, of ruining my career, so naked I was of evidence... My jurisdiction as a police officer ends here, and yours as a fiction writer begins. Why don't you write a novel?