Mohamedou Ould Slahi is a Mauritanian author and former detainee at Guantanamo Bay. He was held for 14 years without charge, during which he wrote a memoir titled "Guantánamo Diary," detailing his experiences and treatment while imprisoned. Slahi was captured in 2001 and accused of terrorism-related activities, but he was never formally charged. His writings have drawn international attention, highlighting issues of human rights and the legal complexities surrounding detention without trial. Slahi was released in 2016 and continues to advocate for justice and human rights.