[Nodding. It's just like any other research for him now. You read about or hear about the unbelievable thing and you believe it because it's real and that's the only choice you have. Or it's the only one he makes at least.]
It sounds like you might have the best shot of figuring out who is affected. Not everyone is displaying their pearls. [They can just as easily be in someone's pocket as on a necklace.]