The Iraqi woman accused of taking American aid worker Kayla Mueller as an ISIS hostage in Syria will be charged by federal prosecutors. The Justice Department is said to be prepared to prosecute Umm Sayyaf, who is in U.S. military custody in Iraq. She will be extradited to the U.S. if the Iraqi government does not object and seek to put her on trial instead. Sayyaf could be charged with providing material support to a foreign terrorist organization and conspiracy to commit hostage-taking, the latter of which can be a death-penalty offense. Mueller died in ISIS captivity from a coalition airstrike in February.