ISIS Accuses Jordan of Killing An American, Kayla Mueller in Their Custody With Air Strikes

PHOTO: Kayla Mueller is seen in this undated handout photo. Mueller was kidnapped in Syria in August 2013.
The last of American ISIS captives, Kayla Mueller has been confirmed dead by the White House. At the heel of her death confirmation, her family released a letter written by their daughter while still in captivity.

The family revealed that they were contacted by an anonymous ISIS member who told them about her death. The source claimed that her death was caused be the Jordanian air strikes.