the first step was to figure out who the last enslaved ancestors were, and sarah miller's death certificateames of her parents, david and violet miller, who would have been adults at the time of emancipation. did you know anything about them? >> not at all. not at all. >> i didn't know anything about them. we didn't. >> reporter: even marion keys, who knew sarah miller, had never heard their names. >> nothing. sure didn't. i just -- i want everybody to know. >> reporter: enter carise bremer, a local historian and genealogist. karen reached out to her to see if she could help. what are the challenges for finding history of african americans? >> african americans were not listed by name until the 1870 census. before that, they were just a number. >> if they were enslaved, they weren't -- >> listed at all. so really, you're looking for any tips and clues that you can. >> reporter: she started by sharswood's then owner, nc, for thanl crenshaw miller. >> there he is. he had 58 slaves here. >> reporter: but with only age and gender listed -- >> you have enslaved people, 69, 44, 34, and not a sing