>> seems marguerite just wanted to secret the stone away, where nobody would think to look.he stone was wrapped in heavy plastic, placed behind a brick wall. it clearly shows oswald's date of birth and death. >> the discovery hits dallas tv news. >>the new owner of the residence is mrs. ida card. >> but notice. you only see a photo of the gravestone in this report. there's a reason for that -- ida's dispatched it to a new hiding place. >> in fact, my stepmother was rather paranoid about the publicity that it was generating back then, so she transferred it for safekeeping over to her sister's house. >> that would be ida's sister, billie, and her husband, albert, who also live in fort worth a few miles away. >>it is in a safe location, but they wouldn't tell me, and i didn't ask 'cause i didn't want to know. >> dad never tried to sell it? >> at one point, they did have a family lawyer come over and look at it, and he said, "hold on to it for a while. it may increase in value." >> and that's just what they do. so the tombstone remains hidden -- in uncle albert and aunt billie's