In September 2022, 16-year-old Nika Shakarami attended a Woman, Life, Freedom protest in Tehran. That day, pictures taken of her burning her hijab made her an icon in the eyes of Iran’s protestors, and a target in the eyes of the Iranian government.

Nika never went home. Iran’s government claimed she jumped from a building, but her mother never accepted it.

Now BBC Eye investigates a shocking new document, purportedly written by the Islamic Revolutionary Guards Corps, which reveals what happened after they hunted her down.