It felt like a betrayal. Reporter mother against son. It makes you question everybody. Reporter everythings at stake. Hardest thing youve ever done. It was the hardest thing. Reporter im lester holt and this is dateline. Heres Keith Morrison with secrets in the smoky mountains. Reporter it seems alive somehow, here in the foothills of tennessees appalachians. The creeping tendrils of mountain mist, that snake and swirl like lies. Theres gold in there somewhere, so they say. The sort of place where you could strike it rich. Or maybe get away with murder. Shocking and devastating. Reporter so, after that mysterious death here, who could anyone trust . Dearest friends . The word, betrayal, come to mind . Oh, absolutely. Reporter brothers in arms . Its beyond disturbing. Reporter closest family . She looked at me as if she wished i was dead. Reporter maybe no one. We were always looking over our shoulder. Reporter might still be, had it not been for him. Pretty shocking stuff. I dont think