My husband's great grandfather was involved in this. His name was Green Barr and I have yet found much on Green but I have found stories about the Feud on the web. Here is a link to one story:
http://www.heritagequest.com/genealogy/magazine/html/broken-...
And another link:
http://ftp.rootsweb.com/pub/usgenweb/ky/owen/history/bullet....
And the third link I have found:
http://www.nkyviews.com/owen/owen_txt_NYT_klan.htm
All I know about Green is that he hid out in the woods and late at nite he would sneak in to visit his parents.