Under Cover of Night
Under Cover of Night is a 1937 American action film directed by George B. Seitz, written by Bertram Millhauser, and starring Edmund Lowe, Florence Rice, Nat Pendleton, Henry Daniell, Sara Haden and Dean Jagger. It was released on January 8, 1937, by Metro-Goldwyn-Mayer. Plot. A professor, Janet Griswald (Sara Haden), is about to announce a great discovery in physics when her jealous husband (Henry Daniell), who collaborated with her, causes her to have a heart attack by throwing her dog out a window. To cover up his heinous deed, he throws a ball the  dog was playing with out the window also to make it seem the dog chased after it. When he can't find her notebook containing the discovery details, he ends up killing several other people. Detective Cross (Edmund Lowe) solves what might have been a perfect crime when he realizes the dog was thrown out the window before the ball.