The parents of Kayla Mueller revealed Friday that their daughter was repeatedly raped by ISIS caliph Abu Bakr al-Baghdadi before her death.
ISIS announced the 26-year-old's death on February 10, saying she had been killed in a coalition air strike.
Before her death earlier this year, 26-year-old Kayla Mueller was a sex slave for the top leader of the Islamic State, the American aid worker's parents have revealed.
Kayla pictured above with her father Carl, celebrating a new baby, in a picture posted to Facebook before her death. The new details about Kayla's abuse discredit previous reports that she had willingly married a member of the terrorist organization
In a Friday interview with ABC on what would have been Kayla's 27th birthday, her parents said that they were informed by government officials that their daughter was repeatedly raped by the caliph of the Islamic State, Abu Bakr al-Baghdadi.
ISIS announced Kayla's death on February 10, claiming that the aid worker from Prescott, Arizona had been killed in an coalition airstrike.
However, ISIS was aware that the U.S. was working to rescue Kayla and the true circumstances of her death are not known.
American officials allegedly learned about Kayla's abuse, after interviewing two Yezedi girls, 16 and 18, who escaped from the same compound where they were all held as sex slaves.
Captor: Kayla was reportedly kept as a sex slave at the Syrian home of Abu Sayyaf, the man in charge of ISIS' oil and gas revenue. Sayyaf was killed in a May raid on his compound, by U.S. Delta Forces
According to the escaped girls, Kayla was held in the home of Abu Sayyaf, a Tunisian man in charge of ISIS' oil and gas revenue.
That was confirmed by Sayyaf's wife, Umm Sayyaf, who was captured in a U.S. raid of the compound.
The caliph is said to have regularly visited the house to both speak to Sayyaf and rape Kayla.
The new information on Kayla's abuse at the hands of ISIS's top leader discredits reports that Kayla warmed to her captors and had even willingly married a member of the state.
Those reports started when the Muellers received a smuggled letter from their daughter a year into her captivity, that read: I am 'completely unharmed and healthy (put on weight in fact); I have been treated w/the utmost respect and kindness.'
Kayla was abducted in August 2013, while working in southern Turkey with Syrian refugees. On August 3, she drove a friend into the bombed-out Syrian city of Aleppo and was driving back when she was taken hostage. She spent two and a half years as a prisoner of the Islamic State, before her mysterious death.