During its 72nd session held in Geneva on 20-29 April 2015, the United Nations Working Group on Arbitrary Detention (WGAD) adopted an Opinion on the case of Bassel Khartabil, a fervent defender of the right to freedom of expression who has been detained without trial since his arrest by the military security on 15 March 2012. In this Opinion, the WGAD considers his detention "arbitrary" and calls for his immediate release.