"Shadow of Suspicion" is a cheap B-movie from Monogram. A B-movie was originally intended as a second and lesser film during a double- feature. As a B, it has several traits you'd expect in such a film- -it's only about an hour long, has a cast of lesser known or unknown actors and was made with a minimal budget. The guys playing Northrup and Dale as well as the rest clearly are unknowns!
The film begins with a guy coming into a jewelry store and attempting to trick them out of some expensive merchandise. But, before they can detect the larceny, he announces that he's been sent out by the head office to work with them on fraud detection. Is this actually the case or is the guy a crook? For much of the film, you have no idea if he or his partner are good guys or bad guys. And, oddly, by the end of the film you STILL aren't sure exactly who they are! But, the plot is engaging and is worth seeing if you are the sort that appreciates Bs.