For journalist Amer Matar, a decade-long search for his younger brother has defined him and changed the course of his life, now dedicated to researching and documenting crimes committed by the Islamic State group in Syria.
His brother, Mohammed Nour Matar, vanished in Syria’s northern city of Raqqa in 2013 while reporting on an explosion that hit the headquarters of an insurgent group. His burnt camera was found at the scene of the blast, and his family soon after got word he was in an IS prison. But there has been no other sign of him since.
