FBI agents sent cloned copies of computers seized from Kim Dotcom and his Megaupload colleagues offshore just days after a judge said a court needed to decide if the agents were allowed to take the material, a court heard.
Dotcom's lawyer Willy Akel said the FBI agents committed an "illegal act" when they sent the 18 cloned computers and other items to the United States by the courier company Fedex.
The latest twists in the saga of file-sharing company Megaupload came after Dotcom and co-accused Finn Batato, Mathias Ortmann and Bram van der Kolk asked the High Court at Auckland to rule the search warrant used by police was too broad.
The men were arrested in January at the request of the US Department of Justice which claimed they were in a conspiracy to criminally violate copyright through Megaupload, which carried 4 per cent of the world's internet traffic at its peak.
Questions by Chief High Court Judge Helen Winkelmann led to the discovery the FBI had already taken copies of the evidence in question. Mr Akel said the paper trail showed the copying and sending of the information happened while defence lawyers were negotiating with the Crown and assurances had been given nothing would be sent.