After the end....

As I see it, there are two possible scenarios after the end:

The Asian wife and man were seen by the policeman, so after the body is discovered, they are arrested, she spills the beans about selling the letter to the lawyer, and confesses to killing Leslie because she was having an affair with her husband, in order to lesser the charges to second degree murder. The lawyer is disbarred, his life ruined.

The second more likely scenario is that the policeman was bribed, as there is a subplot about the Asian code of street justice and their united dislike of the rich colonialists. After Leslie is killed, the lawyer suspects that her husband killed her, but he insists he didn't. . Then he suspects the Asian woman who he saw hated Leslie, but cannot prove it since his part in selling the letter would be exposed, so he remains silent, but his guilt eats away at him for not being an honest lawyer, and he retires and becomes a drinker. His wife convinces him to move away, and they move to America to start over. As for the poor sappy husband, he knows that other people may suspect him of killing Leslie because they know that Hammond was a womanizer and that maybe they suspect Leslie had killed him out of a crime of passion even though she was acquitted. He knows Leslie never loved him. He becomes increasingly paranoid and has a very unhappy life until marrying the lawyers daughter who loves him and they buy the ranch and live happily ever after.

These are just my musings.