Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE (née Miller; 15 September 1890 – 12 January 1976) was an English writer. She is known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple. Christie also wrote the world's longest-running play, a murder mystery, The Mousetrap, and, under the pen name Mary Westmacott, six romances. In 1971 she was appointed a Dame Commander of the Order of the British Empire (DBE) for her contribution to literature.

Giovanni Ignazio Dioguardi (April 29, 1914 – January 12, 1979), also known as John Dioguardi and Johnny Dio, was an Italian-American organized crime figure and a labor racketeer. He is known for being involved in the acid attack which led to the blinding of newspaper columnist Victor Riesel, and for his role in creating fake labor union locals to help Jimmy Hoffa become General President of the Teamsters.