Call Northside 777

In 1932, Frank Wiecek (Richard Conte) is convicted of the murder of a Chicago policeman in a mob-connected speakeasy. Eleven years later, his mother, Tillie (Kasia Orzazewski), takes out a newspaper classified ad asking for information about the crime. Hard-bitten city editor Brian Kelly (Lee J. Cobb) assigns skeptical reporter P.J. McNeal (James Stewart) to investigate.