Advances in DNA genealogy helped identify the alleged third perpetrator in the killings of five people abducted from a Kentucky Fried Chicken restaurant in East Texas in 1983Credit: David Breslauer/APNEED TO KNOWFive people were abducted from a Kentucky Fried Chicken restaurant in Kilgore, Texas, during a 1983 robbery before being found shot to death at a remote oil fieldTwo men were convicted in the killings in 2007 and 2008, but investigators …