Here is an attempted early exploitation flick that ends up being much tamer than the name implies. Mary Lou escapes a prostitution ring and tells the authorities. An investigation begins at the Berrywood road house, a well-known den of iniquity. Love, lust, spanking, jealousy, fighting and some investigating ensues.
Mr. Wong In Chinatown - 1939
A woman seeking help from detective James Wong is killed (Like the two other movies so far, people need to stay away from Mr. Wong!) with a poison dart before she has a chance to explain anything to Mr. Wong. As she dies she has just enough time to scribble “Captain J”