Mohimanul Bhuiya, a former Columbia University student, joined ISIS in Syria. In October 2014, he emailed the FBI asking to return to the United States. “All I want is this extraction, complete exoneration thereafter, and have everything put back to normal with me and my family,” he wrote. Bhuiya then went to a U.S. consulate office in Turkey. Bhuiya’s indictment was placed under seal, and he is cooperating with the U.S. government.