I have a vague memory (as usual) of seeing a fascinating TV segment about the Videla case, I believe it was. Is that not the story of the adopted daughter who has found her real grandmother, the two of them then on her adopting father's case?

You may well be thinking of the great Argentine poet Juan Gelman www.juangelman.org - his son and pregnant daughter-in-law were "disappeared" and murdered in captivity. Gelman's grandchild - turns out to be a girl - was found in Uruguay. Fortunately her adoptive parents don't seem to be fascists - she has been reunited with Gelman and seems to be taking the situation fairly well, which is not always the case.