becoming concern about the fourth. i thought that something must not be right. then, a stunning revelation. do you really think she is capable of hurting a child? based on what i know now? i think anything is possible. tonight, the very latest on the search and the investigat n investigation, little boy the search and the investigat n investigation, little boy lost. captions paid for by nbc-universal television good evening and welcome to dateline. i m ann curry. you may have heard about kyron horman, the little boy who disappeared from his school in oregon last month there has been a massive search, an ongoing investigation. his family, which started out united in trying to find him now finds itself torn apart. tonight, new details on why careen s parents, who might have found solace within the family s ranks have instead found cause for suspicion. here s kate snow. reporter: kyron horman, the 7-year-old boy whose crooked smile showed the world the tooth fai