British lawyer Karim Khan was sworn in as the new chief prosecutor at the International Criminal Court in The Hague on Wednesday. The 51-year-old replaces outgoing prosecutor Fatou Bensouda of Gambia, who extended the war crimes court’s reach during her nine-year term. […] During a career spanning decades, he has argued in all the major international courts and conducted high-profile probes, including a special United Nations investigation into crimes by Islamic State militants in Iraq. He has also courted controversy by representing Kenyan Deputy President William Ruto, the son of late Libyan dictator Moammar Gadhafi, and former Liberian President Charles...