Diamond Pin

Eccentric and wealthy New York widow Ursula Pell loves playing cruel jokes on her guests and particularly on her niece and nephew who are destined to inherit the millions in gems left to her by her late husband. Therefore when she is found brutally murdered in a locked room the morning after a dinner party her niece Iris the most recent victim of Ursula's humiliating pranks is first suspected until all the clues point to her nephew. Where did she stash the gemstones and the much mentioned diamon