Computer hackers Gary McKinnon was being delivered to the United States blockade, also won't face criminal charges in the UK, will end 10 years of lawsuit.
Chief procurator kyle · Starmer QC director said, a successful faith opportunity "high".
McKinnon mother Janice sharpe, said the news as "breathtaking," she thanked words are: "everything is over".
The 46-year-old McKinnon, admitted to enter the United States government computer, but he said he has been looking for evidence of UFO.
The U.S. justice department said it will continue with the British government, in cooperation with "a wide range of common concern".
Starmer announced the decision not to initiate a prosecution for more than three months, the home secretary Theresa may stop Mr McKinnon sought.
Low belief prospect"
The United States sought to authorities tried to McKinnon $800000 (487000 pounds) value of the military computer systems of damage in the face of charges, and in prison, he will face up to sixty years, if convicted.
Mr McKinnon has since 2002 have been sought for, with asperger syndrome.
In October, the British human rights reasons are permitted to stay in the UK medical report, he might try to kill themselves if sought.
In a statement, Mr Starmer, said: "in England and wales brought the potential difficulties, now should not be underestimated, not the passage of time, the logistics transfer sensitive evidence, ready to in the United States court trial in London, the United States government witnesses during his trial, must fully comply with the provisions of the disclosure duty, to participate in the CPS.
"Mr." the prospects of wheat conviction, it reflects the he suspected criminal degree is not high."
He concluded: "in this context, the joint venture CPS/police panel of the metropolitan police said he should not start a new criminal investigation Mr McKinnon assistant commissioner of advice. Metropolitan police assistant commissioner to accept his advice."
In the decision not to initiate a prosecution in Britain, Mr McKinnon mother said: "I'm very happy, very happy to Gary won't go to another long-term trauma.
"I love ratio what all important, now Obama gave Gary Christmas forgiven."
She told the BBC news said: "Gary admit invasion, he always denied damage, I feel ten years have been tortured people, its life damage. How bad, this is hard to explain.
"This too is amazing. Gary experience enough, others was charged with more serious hacker attacks, in this country, they have won 1000 pounds, and the community in a very short sentences.
"Gary regret what he did, he wished he hadn't done it. He wishes he not sad americans, we are sorry, but I'm very thank Theresa may, it's all over."
He Todner McKinnon lawyer Karen said that she is "all sorts of feelings" decision.
She said: "I'm very happy that he will not be charged, because I want to did not think of, he has spent any time in prison, his mental state.
"But I feel very disappointed, because that sought, is still good, because he can't from outside of the UK travel anywhere, will have so of hung over him, until it solution.
"We have discussed close to President Obama, ask forgiveness."
According to the American justice department, the enforcement of the United States and Britain has always been the relationship between the trust, respect and protect our country and eliminate harbouring criminals "common goal as the prerequisite.
It added: "although the home secretary decision McKinnon case, we sought the treaty provides us the interests of the two countries, and the United States continue to pay attention to our cooperation of CPS and English law enforcement authorities widely issues of common concern.
Suicide risk
The United States authorities Mr McKinnon was born in Glasgow action "the big military computer hacker", this is "the influence of the calculation, and the influence of the U.S. government intimidation and stress" all the time.
Mr McKinnon lost an appeal, the higher court of the house of lords and the house of representatives of he sought, but two years ago, the high court judge ruled that McKinnon will have the suicide risk, if off.
Earlier this year the lady can keep decision, in order to the department of civil affairs specified psychiatrist can Mr McKinnon evaluate state of mind.
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