All the victims were black and the youngest was just 12 years old. Some relatives are still searching for the graves. They were killed during a three-year bloodbath in the 1980s, in the South African city of East London – by one person. He killed so many, he lost count. It has been 30 years since the white supremacist apartheid regime crumbled. The unresolved trauma of this time has cast a long shadow across a nation. In piecing together this story, the new season of World of Secrets exposes the disturbed past and racial injustices of South Africa itself.

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Secrets – major BBC global investigations and gripping storytelling. Holding the powerful to account and exposing scandals around the world.