Dick Tracy Meets Gruesome (also known as Dick Tracy Meets Karloff and Dick Tracy’s Amazing Adventure (UK) ) is a 1947 thriller film starring Boris Karloff.
A mysterious Chinese woman arrives at Charlie Chan’s home and is murdered there shortly afterward. The only clues are the ring with which she introduced herself, and the message “Capt K” she scrawled before dying.
Joaquin Shannon confesses to a murder he didn’t commit. He gets a year in prison to start for manslaughter. It gets hard to be on good behavior.
The Society of the Black Dragons sends Bela Lugosi (Dr. Melcher) to transform 6 japanese into indentical likenesses of American industrialists forming a 5th column. This is at the behest of the Nazis.