Call Northside 777 (1948)

Based on a true story, this is an interesting if slightly dry crime drama. Journalist McNeal (James Stewart) is tasked to investigate an old murder case which took place in the 1930s. Wiecek (Richard Conte) was convicted of killing a policeman in 1932 but his mother (Kasia Orzazewski) puts up a reward to find the real killer. As McNeal digs deeper into the case he finds the conviction was unsafe. However, the police are keen for McNeal to be kept away...

McNeal's investigation, truly old skool journalism by putting in the pavement miles and talking to people not copying things off twitter as happens these days, is fascinating as is the glimpse of police procedure and bureaucracy plus a bit of 1940s style information technology. A thoughtful film without much in the way of thrills and spills despite a few limp attempts to add a bit of menace. 

This is a film an engaging film and a treat for criminology geeks. For example, a polygraph is used on Wiecek, applied by Leonarde Keeler the actual inventor of the device! Highly enjoyable.