However, docudrama as a separate category belongs to the second half of the twentieth century. After World War II, Louis de Rochemont, creator of "The March of Time", became a producer at 20th Century Fox. There he brought the newsreel aesthetic to films, producing a series of movies based upon real events using a realistic style that became known as semidocumentary. The films ("The House on 92nd Street", "Boomerang", "13 Rue Madeleine") were widely imitated, and the style soon became used even for completely-fictional stories, such as "The Naked City". Perhaps the most significant of the semidocumentary films was "He Walked by Night", based upon serial killer Erwin Walker. Jack Webb had a supporting role in the movie and struck up a friendship with the LAPD consultant, Sergeant Marty Wynn. The film and his relationship with Wynn inspired Webb to create what became one of the most famous docudramas in history: "Dragnet".