Kim Dotcom's extradition has become less certain after a judgment which will see the FBI having to prove it has the evidence to back up its charges - and a finding the legal document asking he be sent for trial in the United States did not comply with the law.
The ruling came on a day in which Dotcom went back to the High Court to again seek access to his restrained funds - this time to pay lawyer's bills which he has said now worth millions of dollars.
The judgment followed moves by the Crown to have a judicial review into an order which forced an extensive release of evidence in the case. The order, by the district court, ordered the FBI to produce some of the evidence it held against Dotcom so it could be tested during the extradition hearing.
It was challenged to the High Court, which has upheld the earlier finding. The decision by chief high court Judge Helen Winkelmann today is the final decision in an argument over whether the extradition hearing would test some of the substance of the FBI's claims to be probed. Crown Law had maintained it was a limited process while Dotcom has argued he should be allowed to challenge the FBI case.
The internet tycoon denies charges of criminal copyright violation, conspiracy and money-laundering in relation to his Megaupload filesharing website, which once carried 4 per cent of the world's internet traffic.