KUTUPALONG REFUGEE CAMP (Bangladesh) • Mr Mohib Bullah is not your typical human rights investigator. He chews betel and he lives in a rickety hut made of plastic and bamboo. Sometimes, he can be found standing in a line for rations at the Rohingya refugee camp where he lives in Bangladesh.

Yet he is among a group of refugees who have achieved something that aid groups, foreign governments and journalists have not. They have painstakingly pieced together, name by name, the only record of Rohingya Muslims who were allegedly killed in a brutal crackdown by Myanmar's military.