Anyway, so really, what's the big deal about the pinky ring? If confirmed, all it does is further show that he had an affair with her(which the watchbox already does). It still doesn't add any proof that he murdered her. Some might say that maybe he took it off her body after murdering her, but what would be the motive for that? She would be identified sooner or later anyway, and wouldn't implicate him.
Interesting observation, but even if true how does it get us any closer to linking him to the murder?