Andrus Nomm, a 36 year old Estonian who lives in the Netherlands, and one of a small group of ex MegaUpload staffers who are facing extradition to the US for involvement in the running of the controversial file-transfer company, has pleaded guilty to criminal copyright infringement charges and has been sentenced to a year and a day in a U.S. prison. Nomm pleaded guilty in U.S. District Court for the Eastern District of Virginia to conspiracy to commit felony copyright infringement. District Judge Liam O’Grady accepted the guilty plea and imposed the sentence. Nomm is the first defendant to face charges in the U.S. in the Department of Justice’s long-running copyright infringement case against Megaupload, and Nomm voluntarily waived his right to fight extradition. The plea is “a significant step forward in the largest criminal copyright case in U.S. history,” Assistant Attorney General Leslie Caldwell said in a statement. Speculation remains that he had done a deal with prosecutors, and will agree to testify against his former colleagues, including Kim Dotcom. Prosecutors agreed to a light sentence for his guilty plea, the DOJ said in a press release.The DOJ has accused the operators of Megaupload of running websites that wilfully reproduced and distributed movies and other products protected by copyright. In court papers, Nomm agreed with prosecutor estimates that the cost of Megaupload’s infringement was more than $400 million. The final indictment charged the defendants with conspiracy to commit racketeering, conspiracy to commit copyright infringement and conspiracy to commit money laundering. In addition, the defendants are charged with five counts of criminal copyright infringement and five counts of wire fraud.