Parents of hostage Kayla Mueller say Doctors Without Borders helped cause ‘rape and murder’ of their daughter
The humanitarian worker was killed after being tortured and held as a sex slave in dungeon by ISIS for 18 months
THE parents of murdered hostage Kayla Mueller have slammed Doctors Without Borders saying they refused to help negotiate their daughter's release from her ISIS captors.
Mueller, who died last year, was held captive for 18 months by the organisation and kept as a sex slave in a dungeon.
A humanitarian worker from Prescott, Arizona, she had been helping out a hospital run by the organisation, which is also known as Médecins Sans Frontières and MSF when she was kidnapped.
She had been in a vehicle owned by the group on her way from Syria to Turkey when she was abducted.
In an interview with ABC News, her parents Marsha and Carl said the organisation, which provides aid to those in war-torn nations would not speak with them for months, withheld a vital information which could have changed Kayla's fate, and ignored pleas to help them get her released.
A recording made by the couple 10 months after their daughter's disappearance, a senior official from the Doctors Without Borders tells the Muellers: "No...So, the crisis management team that we have installed for our five people and that managed the case for our people will be closed down in the next week ... because our case is closed."
Carl admitted the organisation makes a difference saying: "They're a fabulous organization, and they do wonderful work."
However he added in ABC News' "20/20" interview, which will be broadcast this Friday in the US, "but somewhere in a boardroom, they decided to leave our daughter there to be tortured and raped and ultimately murdered."
Kayla would have turned 28 this month. She was repeatedly forced to have sex with Abu Bakr al-Baghdadi, the leader of ISIS while she was held captive.
Jason Cone, who is the US executive for the MSF, said in the program the organisation had no obligation to help: "I don't think there was a moral responsibility.
"We can't be in the position of negotiating for people who don't work for us."
He said they did not ask her to go to Syria, and would not have done because she was an American citizen.
Kayla was taken hostage in August 2013 with her boyfriend Omar Alkhani after travelling to the country after he was hired to fix the internet service at a Doctors Without Borders affiliated hospital in Aleppo.