Article continues below advertisementIt's unlikely that Savannah Guthrie's missing mom, Nancy, is still alive, according to a former special deputy U.S. marshal. Discussing the 84-year-old's disappearance on journalist Ashleigh Banfield's show "Drop Dead Serious" last Tuesday, February 17, Spencer Coursen explained that when you've been kidnapped, your "life expectancy drops about 90 percent when you are moved to a second location." Spencer went on to tell viewers that due to the grim statistic, you should "fight like your life depends on it" if you ever think you're "about to be abducted.