Kayla Mueller, an Arizona native, has been confirmed dead after a Jordanian airstrike on the building in Syria where she was being held captive.

Mueller was taken captive August 4, 2013, just days after her 25th birthday, after leaving a Spanish Doctors Without Borders Hospital in Aleppo, Syria.

Islamic State Jihadists are known for the bloody, fiery spectacles they make of their prisoners -- even women. Mueller's life and death, however, were kept largely out of the public eye, an odd departure for the Islamic State's notorious propagandists.

Mueller's family received a letter in the spring of 2014 while she was still being held captive. Kayla is the fourth American to die in Islamic State custody.

[via ABC]