Computer hacker Gary McKinnon's mother has thanked Home Secretary Theresa May for blocking her son's extradition, telling her she had done "the right thing".
"Thank you Theresa May from the bottom of my heart - I always knew you had the strength and courage to do the right thing," Janis Sharp said. Her thanks came after Mrs May ruled there was such a high risk of Mr McKinnon ending his life that a decision to extradite would be incompatible with his human rights.
Mr McKinnon was accused by US prosecutors of "the biggest military computer hack of all time", but he claims he was simply looking for evidence of UFOs.
Mrs May stopped his extradition on human rights grounds after medical reports showed the 46-year-old was very likely to try to kill himself if extradited.
"After careful consideration of all of the relevant material, I have concluded that Mr McKinnon's extradition would give rise to such a high risk of him ending his life that a decision to extradite would be incompatible with Mr McKinnon's human rights. I have therefore withdrawn the extradition order against Mr McKinnon.
"It will now be for the director of public prosecutions to decide whether Mr McKinnon has a case to answer in a UK court."
A so-called forum bar will also be introduced to extradition proceedings to enable a UK court to decide whether a person should stand trial in the UK or abroad, Mrs May added. It will be specifically designed to ensure it does not fall foul of "delays and satellite litigation", Mrs May told MPs.
Mr McKinnon's MP David Burrowes said: "Today is a victory for compassion, and pre-election promises being kept."
Shami Chakrabarti, director of civil rights group Liberty, said: "This is a great day for rights, freedoms and justice in the United Kingdom. The Home Secretary has spared this vulnerable man the cruelty of being sent to the US and accepted Liberty's long-standing argument for change to our rotten extradition laws."
The family of terror suspect Babar Ahmad, who was extradited alongside radical cleric Abu Hamza earlier this month, accused the Government of "blatant old-fashioned racism", saying in a statement: "Many of our supporters are angry at what appears to be blatant old-fashioned racism under which all British citizens are equal but some are more equal than others." The move was "a clear demonstration of double standards", they added.