The ongoing incarceration of the last British resident held at Guantanamo Bay is making a "mockery of justice", according to human rights campaigners.
Shaker Aamer, 43, will have been held without charge for exactly nine years tomorrow.
Amnesty denounced the "cruel limbo" he has been left in as the campaign group renewed calls for him to be tried or released back to his wife and children in the UK.
Aamer is originally from Saudi Arabia but is married to a British citizen and has four British children.
"Now there could be light at the end of the tunnel for Shaker," said Amnesty International director Kate Allen.
"Currently all the signs point to heightened behind-the-scenes activity over Shaker's situation and it's vital that we say to politicians 'we won't rest until his case is fairly resolved'.
"Given the time involved, the lengthy spells in solitary confinement and the torture allegedly used against him, Shaker Aamer's plight has been one of the worst of all the detainees held at Guantanamo."
Aamer was captured in December 2001 by the US, which has claimed he was fighting with the Taliban, and moved to Guantanamo the following year, but no charges have ever been brought.
In February 2002 Aamer was transferred to the US military detention centre at Guantanamo Bay, where he has languished ever since.
He led the first hunger strike at Guantanamo and was one of the detainees who claimed that he was tortured numerous times in Afghanistan, including by US officials while British personnel were present.