Report on human rights violations and violations of international law committed by armed forces in the crackdown on protests (economic crisis; political crisis; unlawful killings of protesters between December 2018 and April 2019; arrest and detention of protesters and activists from December 2018 to April 2019; use of excessive force and unlawful killings at sit-in in Khartoum in June 2019; sexual violence against women; justice and accountability)