By Mariana van Zeller

While investigating the story, FRONTLINE/World reporter Mariana van Zeller listened to many conflicting opinions about the massacre and the illegal mining of diamonds on tribal land.

Mariana van Zeller
Frontline/World Reporter Mariana van Zeller

Read her interviews with a chief of the Cinta Larga tribe and with representatives from the miner's union and the Brazilian authorities as they talk about the violence and mistrust that has traumatized the community.