An Indonesian film actor known for his involvement in the critically acclaimed documentary "The Look of Silence," he gained international recognition for his role in confronting the perpetrators of the Indonesian mass killings of 1965–66. His participation in the film, directed by Joshua Oppenheimer, is pivotal in exploring themes of memory, trauma, and reconciliation. Despite the personal risk, his courage in seeking truth and justice has made a significant impact on global audiences and documentary filmmaking.