During the past month, “The Dusty Attic,” a classic-radio program of the Radio Talking Books Service offered a series of four hour-long programs on the same theme as “Newspaper Heroes on the Air,” exploring the role of newspapers in society and their depiction in audio dramas.

A special attraction: A comparison of two broadcasts inspired by the same real-life newspaper investigation that freed an innocent man from jail. One production was an “audition” for an eventual radio series, the other a dramatization of a classic Hollywood film based on the case, “Call Northside 777.”

The shows were hosted by researcher and collector Joe Webb, who has done extensive investigations of “The Big Story” and “Casey Crime Photographer,” among other series. The four-part series has been preserved on its own Internet Archive page as “Dusty Attic Newspapers.