Dave Holloway: No. Nobody described hearing a fall down the stairs ... Tracy Smith: Did Dr. Sills talk about his wife? Joanie Rickers: Oh, never. Tracy Smith: Didn't ever say how she died?

(NBC News) — On Friday’s “Dateline,” a Southern California woman’s fall down ... would tell. Dr. Sills was in a life-and-death battle. Only this time the patient was his wife Susann.