According to the family lore, professional football-great Jerome Bettis’s great-grandfather simply disappeared. End of story? Not on this week’s Who Do You Think You Are? Bettis starts his search with a death record and continues on his quest, discovering stories of strength and family members who were born into slavery. Ancestry.com is a sponsor of the show, airing Friday nights at 8/7c on NBC. Plus visit www.ancestry.com/wdytya starting Saturday morning to learn more about using death records in your research.