USA Today (7 April 2009) is reporting that a DNA study has extended
the branches of Alex Haley's family tree.
The clue came when a "78-year-old man in Scotland named Thomas Baff, ... took
the DNA test to help his daughter" who was working on the family history.
http://blog.genealogybank.com/2009/04/alec-haleys-family-tree-grows-via-dna.html
and
http://www.usatoday.com/tech/science/genetics/2009-04-06-haley-dna_N.htm