By November 2010, The Guardian reported that US embassy cables in the Wikileaks showed then-U.S. Ambassador to Luxembourg, Cynthia Stroum, praising Begg for his campaign to persuade European nations to take in Guantanamo detainees for resettlement.
In June 2007, he was one of 39 people cited in a joint release by HRW, Cageprisoners, Center for Constitutional Rights and the New York University School of Law as prisoners who have not been accounted for, and are likely held in secret CIA Black sites.