The House Across the Street (1949)

Dave Joslin, the managing editor of a big-city newspaper, is demoted and moved to the Miss Lonely Hearts column-writing department by the newspaper's publisher, J. B. Grennell, because Joslin refuses to desist in printing stories linking a gangster, Matthew Keever, to a murder. But Joslin, aided by Kit Williams, a newspaper woman with whom he is in love, investigate the murder case on their own time.