Annie Carpenter's life was upended by colonialism, the Indian Act and the residential school system. For 80 years, her family tried to find out what happened to her. Now, journalist and filmmaker Tanya Talaga is telling her great-great grandmother's story in her new book and documentary series, The Knowing. She talks to Mattea Roach about the struggle to find her relative, crossing paths with the Pope, and what she believes will help move us forward on the road to reconciliation.