On 3 April 2015, the U.S. Department of the Treasury removed Buhary Syed Abu Tahir from the Specially Designated Nationals List ("SDN List"). The U.S. designated Tahir, a Sri Lankan national, as a proliferator of weapons of mass destruction on 12 January 2009 for allegedly helping A.Q. Khan, the father of Pakistan's nuclear research program, sell nuclear secrets to Iran, Libya and North Korea. Tahir was alleged to have voluntarily confessed, while detained in Malaysia, to helping Khan. The circumstances surrounding his confession were contested at the time and many doubted its veracity. Neither the State Department nor the Treasury Department commented on his removal from the list.