U.S. intelligence officials say American hostage Kayla Mueller, an American aid worker, was raped repeatedly by the group´s leader, Abu Bakr al-Baghdadi, while in captivity in Syria.
The woman from Prescott, Arizona was taken hostage with her Syrian boyfriend in August 2013 and confirmed dead in February this year.
Mueller was held by ISIS financier Abu Sayyaf and his wife. Baghdadi ocassionally visited and raped her. This was also confirmed by a 14-year-old Yazidi teenager who was held together with Mueller and escaped last October.