A Slight Case of Murder is a 1938 comedy starring Edward G. Robinson as a gangster who decides to go straight. This is very watchable, filled with delightful 1930s-era cuteness. I loved it. You can't go wrong with Robinson, after all.
The New York Times, in a review from the film's release, calls it "immoderately" amusing, praising the writing, the direction, and "the flavorsome performances of an unusually apt and well-chosen cast."