Article continues below advertisementNancy Guthrie's kidnappers may have had their initial plans of an "easy" money-grab abduction foiled by a potential medical episode.According to cold case expert Brian Martin, the 84-year-old missing mother of Today host Savannah Guthrie likely suffered a fatal health problem during her kidnapping, forcing her captors to "dispose" of her body after she lost "value" by no longer being alive.