Answer
Winterset is the film that features Meredith as a character named Mio Romagna. The film is a 1936 American drama directed by Alfred Santell and starring Burgess Meredith, Margo, and Eduardo Ciannelli. It is based on the 1935 play of the same name by Maxwell Anderson. The film tells the story of Mio Romagna, a young man who is accused of murdering a police officer.