The Black Pigeon

There were plenty of reasons for Handsome Harry Borden to be murdered. After all, he had cost numerous investors their life savings with questionable securities. And he had left his wife for a string of actresses and dancers, only to shed each in turn for a new flame. And the office boy that he had bullied. Not to mention the jealous boyfriend of his secretary to whom he had made unwanted advances. So there were plenty of suspects when was found dead of a gunshot wound in his office. The question is, which of them actually committed the crime?