The Invisible Menace (1938)

Army Private Eddie Pratt smuggles his new bride into camp in hopes of having a happy wedding night. Instead they discover a murder. Colonel Rogers of Army Intelligence arrives to take over the case. The prime suspect, Jevries, is well-known to Rogers, who sets out to get a confession from Jevries even though there are plenty of other suspects. In the end, Eddie's bride Sally surprisingly turns the tables on the culprit.