Via CNN:

… Speaking exclusively to CNN, Zeinat (not her real name), 16, has told of how al-Baghdadi beat and mistreated her. She also says he raped American hostage Kayla Mueller, who was held captive by the group after being taken hostage in 2013.

“He treated us so badly,” she says, her beautiful, expressive blue eyes peering out fearfully from behind a rust-red tasseled headscarf as she relates her harrowing ordeal at the hands of one of the world’s most wanted men.

Selected by the terrorist leader — though she did not know who he was at the time — at a slave market in “a white palace … between the mountain and the sea,” Zeinat and eight other girls were taken to his home in Raqqa, Syria, the de facto capital of ISIS’ territory.

As soon as she arrived, she says, she was made to watch a video showing ISIS fighters beheading a Westerner and threatened with the same fate unless she agreed to abandon her Yazidi faith.

“There was a journalist, an American journalist, and there was a man dressed all in black,” she remembers. “He killed the journalist. He beheaded him.”

Zeinat’s description matches widely circulated ISIS videos of the killings of James Foley, Steven Sotloff and other Western hostages.

“(Al-Baghdadi) showed us this on the laptop, and they said to me, ‘If you don’t convert to Islam, this will happen to you — we will behead all of you,'” she recalls.

“‘You have two choices,’ they said. ‘Convert to Islam. Or die like this.'”