Question: Where was one of Dennis Edney's clients detained for ten years?
Sentence (from "Omar Khadr"): Omar Ahmed Sayid Khadr (born September 19, 1986) is a Canadian citizen who was detained by the United States at Guantanamo Bay for ten years, from the age of 16, during which he pleaded guilty to the murder of U.S. Army Sergeant 1st Class Christopher Speer and other charges.
Relevant evidence: Yes