Gary McKinnon's ten-year battle against extradition is over after Home Secretary Theresa May confirmed that he would not be placed in the hands of US authorities.

His mother, Janis Sharp, thanked Home Secretary Theresa May for blocking her son's extradition, saying: "Thank you Theresa May from the bottom of my heart - I always knew you had the strength and courage to do the right thing."

In a statement to the House of Commons, Mrs May said the "seriously ill" computer hacker would not be extradited as he was a suicide risk.

"The decision to extradite would be incompatible with Mr McKinnon's human rights," she said.

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McKinnon was labelled as 'the biggest military computer hack of all time' by US prosecutors

"As the house would expect I have very carefully considered the representations made on Mr McKinnon's behalf," she told MPs.

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.

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Gary McKinnon Extradition Verdict: Timeline Of Key Events

Mrs May said the sole issue she was considering was whether "extradition to the United States would breach his human rights".

There was no doubt McKinnon is "seriously ill" and the extradition warrant against him should be withdrawn, she said.

It is now for the director of public prosecutions Keir Starmer QC to decide whether he should face trial in the UK, Mrs May added.

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.

Home Office medical evidence showed McKinnon was very likely to try to kill himself if extradited to the US, where he faced up to 60 years in prison if convicted.

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Janis Sharp, mother of computer hacker Gary McKinnon, leaves her home in Hatfield prior to Mrs May's statement

The US stance also appeared to soften this summer, with government adviser John Arquilla saying they should be recruiting elite computer hackers to launch cyber-attacks against terrorists instead of prosecuting them.

Both Prime Minister David Cameron, who has held talks on the case with President Barack Obama, and his deputy Nick Clegg have previously publicly condemned plans to send McKinnon to the US.

McKinnon's mother Janis Sharp said yesterday: "People like this would not use Gary's case as a key part of an election campaign and then leave him for two-and-a-half years and then throw him to the wolves.

"It would seriously damage their reputations in terms of honesty and integrity."

McKinnon, from Wood Green, north London, was arrested in 2002, and then again in 2005, before an order for his extradition was made in July 2006 under the 2003 Extradition Act.

That triggered three successive applications for judicial review and questions about the fairness of the UK-US extradition treaty, which critics claim is one-sided.

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  • Janis Sharp, mother of Gary McKinnon, at

    Janis Sharp, mother of Gary McKinnon, attends a protest outside the Home Office against the Home Secretary's decision not to halt his extradition to the US, in Central London on December 15, 2009. Gary McKinnon, who suffers from a form of autism, could spend life in prison if convicted by a US court of gaining access to 97 computers in 2001 and 2002 in the aftermath of the September 11, 2001 attacks. AFP PHOTO/Ben Stansall

  • Janis Sharp (2nd R), mother of Gary McKi

    Janis Sharp (2nd R), mother of Gary McKinnon, Liberal Democrat Leader Nick Clegg (3rd R) and Liberal Democrat Chris Huhne (4th R) attend a protest outside the Home Office against the Home Secretary's decision not to halt his extradition to the US, in central London, on December 15, 2009. Gary McKinnon, who suffers from a form of autism, could spend life in prison if convicted by a US court of gaining access to 97 computers in 2001 and 2002 in the aftermath of the September 11, 2001 attacks. AFP PHOTO/Ben Stansall

  • Gary McKinnon extradition

    Computer hacker Gary McKinnon's mum Janis Sharp with a letter and flowers she is planning to give to the Queen.

  • Gary McKinnon extradition

    Computer hacker Gary McKinnon's mum Janis Sharp with his girlfriend Lucy Clark with a letter and flowers they plan to give to the Queen.

  • Gary McKinnon extradition

    Janis Sharp, holds a card signed by politicians and well wishers for her son, computer hacker Gary McKinnon, on Westminster Bridge, London, as authorities in the US want him to stand trial for hacking into top secret military computers, Mr McKinnon, from Wood Green, north London, suffers from Asperger's syndrome, says he was looking for evidence of UFOs.

  • Gary McKinnon extradition

    Janis Sharp (right) the mother of Gary McKinnon with Trudie Styler, as outside number 10, Downing Street, handing in a book and poems written by Gary, to mark the 10 years since her son's arrest on US hacking allegations.

  • Gary McKinnon extradition

    Janis Sharp (right) the mother of Gary McKinnon with Trudie Styler, as they stand outside number 10, Downing Street, before handing in a book and poems written by Gary, to mark the 10 years since her son's arrest on US hacking allegations.

  • Decision Expected On The Extradition Of Computer Hacker Gary McKinnon

    LONDON, ENGLAND - OCTOBER 16: Janis Sharp, the mother of British computer hacker Gary McKinnon, is photographed as she attends a press conference following a decision by Home Secretary Theresa May not to extradite Mr McKinnon to the US on October 16, 2012 in London, England. Mr McKinnon, who sufferers from Asperger''s Syndrome, admits to accessing US Government computers but claims he was looking for evidence of UFOs. Mrs May told MPs in the House of Commons that Mr McKinnon was 'seriously ill' and that enforcing the extradition warrant would be in breech of his human rights. (Photo by Oli Scarff/Getty Images)

  • Janis Sharp, the mother of computer hacker Gary McKinnon leaves her home near Hatfield, England, Tuesday, Oct. 16, 2012. Britain's government says Gary McKinnon won't be extradited to the United States, ending his decade-long campaign to avoid trial there over allegations he broke into sensitive military and NASA computer networks. (AP Photo/Kirsty Wigglesworth)

  • Janis Sharp, the mother of British computer hacker Gary McKinnon reacts, during a news conference in London, Tuesday, Oct. 16, 2012. A British computer hacker's decade-long struggle to avoid trial in the U.S. over alleged breaches of military and NASA networks ended in success Tuesday, as the U.K. government ruled he was unfit to face charges there. Home Secretary Theresa May said she had blocked the U.S. request to extradite Gary McKinnon after medical experts concluded he was seriously depressed and that there was "a high risk of him ending his life." (AP Photo/Matt Dunham)

  • Decision Expected On The Extradition Of Computer Hacker Gary McKinnon

    LONDON, ENGLAND - OCTOBER 16: Janis Sharp, the mother of British computer hacker Gary McKinnon, is interviewed after a press conference following a decision by Home Secretary Theresa May not to extradite Mr McKinnon to the US on October 16, 2012 in London, England. Mr McKinnon, who sufferers from Asperger''s Syndrome, admits to accessing US Government computers but claims he was looking for evidence of UFOs. Mrs May told MPs in the House of Commons that Mr McKinnon was 'seriously ill' and that enforcing the extradition warrant would be in breech of his human rights. (Photo by Oli Scarff/Getty Images)

  • Janis Sharp, the mother of British computer hacker Gary McKinnon reacts, during a news conference in London, Tuesday, Oct. 16, 2012. A British computer hacker's decade-long struggle to avoid trial in the U.S. over alleged breaches of military and NASA networks ended in success Tuesday, as the U.K. government ruled he was unfit to face charges there. Home Secretary Theresa May said she had blocked the U.S. request to extradite Gary McKinnon after medical experts concluded he was seriously depressed and that there was "a high risk of him ending his life." (AP Photo/Matt Dunham)

  • McKinnon extradition

    Janis Sharp, mother of Gary McKinnon, arrives for a press conference at her solicitors in London today.

  • McKinnon extradition

    Janis Sharp, mother of Gary McKinnon, arrives for a press conference at her solicitors in London today.

  • McKinnon extradition

    A supporter of Gary McKinnon congratulates his mother, Janis Sharp, before a press conference at her solicitor's in London today.

  • McKinnon extradition

    Janis Sharp, mother of Gary McKinnon arrives for a press conference at her solicitors in London today.