The High Court blocked the extradition of Lauri Love, from Suffolk to the United States closing yr.
Mr. Love, 34, is alleged to have stolen facts from US groups.
He became arrested and items have been seized by using British police. Although he turned into charged within the US, he faces no expenses in the UK.
On Monday, Mr. Love, who has British-Finnish nationality, is taking the National Crime Agency (NCA) to court.
The case is being heard at Hendon Magistrates’ Court in London.
In 2015, the NCA said it was refusing handy returned Mr. Love’s computer systems till he helped them decrypt a number of the documents.
Mr. Love, of Stradishall, stated that, as the “NCA has no longer elected to pursue prices and has apparently no longer positioned any efforts into this cease”, it’s time they lack the assets to him.
He said he became involved at the “absurdly protracted” duration of time that he has had to look ahead to a decision of the case.
Mr. Love, who became arrested in 2013 on suspicion of Computer Misuse Act offenses, stated it become critical to “withstand” actions that result in the “arbitrary deprivation of belongings and records”.
The NCA said the investigation persisted and a spokeswoman added: “A range of devices were seized by means of the NCA at the time, and these gadgets remain in the arms of the NCA.”
Mr. Love allegedly stole statistics from US corporations, including the Federal Reserve, the USA Army, the protection department, Nasa and the FBI, in a spate of online attacks in 2012 and 2013.