Since the demise of the Pinochet dictatorship in 1990, collaboration and complicity - both in the torture chamber and civil society - have been taboo topics not only for the Chilean left but also for society at large. By revisiting the experience of Luz Arce Sandoval - a leftist militant turned collaborator with Pinochet's secret police - Luz Arce and Pinochet's Chile raises urgent political and ethical questions about how nations carry out unspeakable violence in the name of "progress" and "democracy." Juxtaposing interviews, legal documents, and academic analysis, this book probes the personal and collective dimensions of torture, collaborationism, truth, justice, reconciliation, and memory, issues that resonate in Latin America and beyond.