Through the lens of Guatemala’s Jorge Carpio Nicolle case I analyze the mechanisms that preserve impunity in Latin American nations struggling to emerge from violent conflict and embrace, the rule of law. I reveal how the infective influence of parallel powers, the ineffectiveness of the judicial process, and obstructive legal doctrine destroy domestic efforts to prosecute those responsible for human rights violations. The Carpio case exposes the role of international courts in providing justice when domestic courts fail to do so, and it demonstrates the importance of human rights groups in pursuing this justice.