Claims of an FBI double-cross is threatening to jeopardise the extradition case against Kim Dotcom in the U.S.
In new evidence, the Department of Homeland Security served a warrant on Dotcom's Megaupload file-sharing company in 2010, which the founder alleges forced the preservation of pirated movies found in a separate piracy case.
Subsequently when the FBI applied to seize the site earlier this year, it claims the company failed to delete 36 of the 39 files found during there previous search.
After a East Virginia Court allowed partial access to the application, Dotcom's websites were shutdown with the now New Zealand resident claiming they were legally unable to delete the movies.
"We were informed by (the U.S. government) we were not to interfere with the investigation," Dotcom told the New Zealand Herald.
"We completely co-operated.
"Then the FBI used the fact the files were still in the account of the ... user to get the warrant to seize our own domains. This is outrageous.
"Immediately we hit the jackpot - the first little piece of paper is this super-jackpot."
Describing the act as "bad faith" by the U.S. government, Dotcom argued he has continually followed protocol and cooperated with official requests.
"We have always co-operated. We have responded to takedown requests, we have been a good corporate citizen," he said.
"I understand why the US is working so hard to appeal the discovery decision."
The Megaupload founder is currently fighting extradition to the U.S. over piracy claims made by the U.S. government.