What would you do one day if you woke up dead? You're walking, talking, but you're dead: your brain and skin and organs no longer belong to you. Well, for those with Cotard's Syndrome, that is a terrifying reality.

In August 1995, 23 year old Heather Teague went sunbathing on Newburgh beach in Henderson County, Kentucky. Then someone emerged from the woodland behind, pulled her up by her hair and threatened her with a gun, forcing her back into the trees. And wildly, this was all witnessed by a man and his...