Sager comes from Kuwait, where he was born stateless and undocumented. He graduated from the Medical University of Sofia and has been living in Bulgaria for 12 years. In September 2018, he decided to apply under the new statelessness determination procedure. On 3 January 2019, when he appeared at the Migration Directorate to check on the progress of his application, Sager was abruptly detained with no explanation. He was taken to one of the detention centres for illegal immigrants in Busmantsi, where he remained for over a month. He was released with the legal assistance of FAR. Sager has still not received his legal status, leaving him in legal limbo unable to continue his life and practice as a doctor.