A UN investigation has found more than 200 mass graves in areas of Iraq once controlled by the Islamic State (IS) group. IS seized parts of Iraq in 2014 and imposed brutal rule, commonly killing anyone of whom it disapproved. The sites contain critical evidence that will not only identify the victims but also help prosecutors build cases for war crimes, crimes against humanity, and possibly genocide. Investigators estimate that between six and twelve thousand victims are buried at the sites, including women, children, the elderly, people with disabilities, foreign workers, and members of the Iraqi security forces. Ján Kubiš, the UN special representative for Iraq, said, ‘The mass grave sites are a testament to harrowing human loss, profound suffering and shocking cruelty. (Analysing the evidence) will be an important step in the mourning process for families and their journey to secure their rights to truth and justice.’