In 2018, the Congolese gynecologist Denis Mukwege was awarded the Nobel Peace Prize for his work to end rape as a weapon of war. Speaking to a rapt and tearful audience at that year’s Nobel award ceremony in Oslo, he mentioned a report that was “gathering mold in an office drawer in New York.”

The 550-page tome he referred to was released by the United Nations High Commissioner for Human Rights in October 2010. It painstakingly documented and mapped the locations of 617 instances of war crimes, crimes against humanity, and perhaps even genocide, allegedly committed by local combatants, militias and foreign armies during a decade of brutal violence in the Democratic Republic of Congo during the late 1990s and early 2000s. Yet few of these abuses have been brought to trial.