"In her parched, crumbling corner of a Cape Town public housing complex, Deidre van Deventer receives a call from the South African police department. Her family home, recently reclaimed by the government, has become the scene of a criminal investigation. The remains of several bodies have just been unearthed from their land, after decades underground. Detectives pepper her with questions: Was your brother a member of a pro-apartheid group in the...