British lawyer Karim Asad Ahmad Khan walks in the streets of the holy city of Najaf in central Iraq during his visit to the war-torn country's Shiite Muslim Grand Ayatollah Ali Sistani on January 23, 2019. - Khan, an ex defence lawyer of Liberian former President Charles Taylor, heads a United Nations team authorized over a year ago to investigate the massacre of the Yazidi minority and other atrocities by jihadists in Iraq. 
The UN Security Council adopted a resolution in September 2017 to bring those responsible for Islamic State group war crimes to justice -- a cause championed by Nobel Peace Prize winner Nadia Murad and international human rights lawyer Amal Clooney. (Photo by Haidar HAMDANI / AFP)
British lawyer Karim Khan in Najaf in central Iraq during his visit to Grand Ayatollah Ali Sistani.  AFP

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