Human rights violations, including secret detention and torture, have created a climate of fear in Sudan. Human rights defenders, political dissidents, students and members of ethnic minorities continue to be arbitrarily arrested and detained. Chief among the agents of government repression is the National Intelligence and Security Service (NISS), whose members have immunity from prosecution for all crimes committed in the course of their work. This report illustrates the human rights violations committed by the NISS in Sudan, and the extensive powers and immunities the NISS continues to enjoy under the 2010 National Security Act.