The Paradine Case - Hitchcock's interest
I think one of Hitchcock's interests about the film was its a study on a nymphomaniac like Mrs. Paradine. And how the society viewed Mrs. Paradine. Instead of Treating Mrs. Paradine, the jury punished her as a murderer.
Look the connection between Mrs. Paradine (Valli) and Lord Horfield (Charles Laughton). Mrs. Paradine is a nymphomaniac. Same thing with Charles Laughton's character Lord Horfield. He is a Satyromaniac. For Example, take the scene where Charles Laughton (Horfield) looks at Ann Todd's shoulder.