Alleged computer hacker Lauri Love may help British investigators to bring charges against him to get the case “over and done with”.
The 33-year-old is waiting to hear if he will face prosecution in the UK over claims that he stole huge amounts of data from US agencies in a spate of online attacks in 2012 and 2013.
On Monday it was confirmed that American authorities will not fight a High Court decision to block Mr Love’s extradition to the US, on the grounds that it would be “oppressive” to his health.
The engineering student, who has Asperger syndrome, as well as a depressive illness and severe eczema, said: “It’s the first time in four years that I’ve been confident that I have a future in my life.”
He announced on Twitter at the weekend that there is now no prospect of him being extradited to the United States.
However, speaking to the Press Association on Monday Mr Love said that if UK authorities cannot gather enough evidence against him, the case could be left open indefinitely in the US, meaning he will not feel safe to travel outside England and Wales.
He said: “The US may for whatever reason be somewhat reluctant to co-operate with sending evidence, so the CPS may find it’s difficult to prosecute the case.
“I may have to help them in order to get it over and done with.
“If I’m not convicted or acquitted here then the US can keep the case open indefinitely.
“If there is no evidence I might have to make a decision, do I do the job of the state for them and help them prosecute me?”
But he added: “I’m not at all convinced that I committed any crimes. It’s for the US to cough up a bit of evidence.”
Authorities in America fought for Mr Love, from Stradishall, Suffolk, to be extradited to face trial on charges of cyber-hacking, which lawyers said could have meant a sentence of up to 99 years in prison if found guilty.
He is alleged to have stolen data from bodies including the Federal Reserve, the US army, the defence department, Nasa and the FBI.
A CPS spokesman confirmed that Mr Love will not be extradited. It has applied for permission to clarify a point of law that does not affect his case.