Today, on the way to work, I caught the latest This American Life episode - The Ghost of Bobby Dunbar. Whewf. All genealogists and genetic genealogists who have ever encountered a family secret will find it fascinating.
In short, (you really should go listen), a woman is handed an album of papers and news articles about her grandfather that sets her onto the trail of a family mystery. In uncovering the truth, she is faced with two families who have very different accounts of how the event unfolded. At the crux of the matter is who her grandfather is, and in turn, who she and his other descendants are.