This article focuses on the challenges of ‘long-delayed’ prosecutions, that is, criminal prosecutions that begin decades after the conflict, using the experience of the International Criminal Tribunal for Bangladesh (ICT-BD) as a case study. This issue is still an insufficiently discussed topic even though such prosecutions are likely to become more common in the future. This is because of the greater emphasis that is being placed on fighting impunity around the world, as well as legal and historical reckoning with past atrocities. As one ICT-BD prosecutor put it, the establishment of the ICT-BD in Bangladesh has opened the door for the possibility of accountability in other South Asian countries and more broadly. One day, the political leaders of such countries may find the political will to try perpetrators of mass atrocities even after a long delay. Indeed, it is possible that such prosecutions may become more common: