Syrian-Palestinian software engineer Bassel Khartabil , also known as Bassel Safadi, has not been seen since October 4, 2015. It is rumored that he has been secretly sentenced to death by the Syrian government.
The open-source software developer and blogger has been in prison in Syria since March 2012. In October 2015, Bassel was transferred from Adra prison  to an undisclosed location. His wife, Noura Ghazi, reported that  “military police took Bassel from his cell in Adra with a ‘top secret’ sealed order from the Military Field Court.” On November 12, 2015, Ghazi reported  that she was contacted by people who identified themselves as insiders in the Assad government who informed her of the alleged death sentence.
Ghazi wrote on Facebook:
إجاني خبر صاعق انو باسل محكوم اعدام وهاد بيعني انو نقلو عالشرطة العسكرية كتير خطير … ما بعرف شي غير هيك وما بعرف اذا تنفذ شي بحقو … يارب نقدر نساعد باسل … يا رب ما يكون فات الاوان عالمحاولات …. كتير خايفين على حياة باسل
I've just gotten disturbing and shocking news that Bassel has been sentenced to death. I think this means that the transfer to military prison was very dangerous. I really don't know other news. May God help him, we hope it's not too late. We are worried sick about his life.
While these rumors are difficult to confirm, Bassel's whereabouts still remain unknown. Over 37,000 supporters have signed an open petition  urging Syrian authorities to inform Bassel's family of his whereabouts and give him clemency.
Supporters are now turning to the United Nations’ Secretary-General Ban Ki-moon  and asking for his support. The Secretary-General has pushed governments around the world to free prisoners of conscience, at times with success. We urge the Secretary-General to uphold international commitments to human rights and join us in demanding Bassel's immediate and safe release.