For someone who grew up in the Fifties watching Dragnet as a kid, viewing this film in the Nineties was strange: the cop-heroes of that TV show, Jack Webb and Harry Morgan, are now villains in this film!
Webb played the tougher of the two characters, by far, and was effective in that role. Meanwhile, Alan Ladd played his normal good guy-tough guy role. Another odd thing about this movie is that Ladd was an agent for the U.S. Post Office, an organization - at least back then before people went "postal" - one doesn't normally think need policemen.
But, as it was explained in the film, it was needed and the movie goes quickly from a corny-hokey start into a tough film noir. Phyllis Calvert adds a soft touch to the proceedings as a nun who humanizes Ladd, and helps him with the case.
In all, I'm making this sound perhaps more interesting than it was, because it was okay but nothing super. Still, I'd like to see it get a DVD treatment some day and I'd consider buying it.