Karl Decker, pen name Charles Duval, (died 1941, age 73) was a journalist in the United States who worked for William Randolph Hearst's New York Journal.
He covered events leading up to the Spanish American War and helped Evangelina Cosio y Cisneros escape from a Spanish prison.
Amy Ephron wrote about the events in her book White Rose (2000).
[4] Before the war, Decker collaborated with filmmaker William C. Paley, covering a funeral procession for those killed on the U.S.S.
[5] Later in his career, while working at the Saturday Evening Post, he made claims about who was responsible for the theft of the Mona Lisa.