Ok, I know it's Wikipedia but it says: Representing McKinnon in the House of Lords on 16 June 2008, David Pannick QC told the Law Lords that the prosecutors had said McKinnon faced a possible 8-10 years in jail if he contested the charges (there were seven counts), but only 37-46 months if he co-operated and went voluntarily to the US. McKinnon also claimed that he had been told that he could serve part of his sentence in the UK if he co-operated. He had rejected the plea bargain offer as no guarantee had been given by the Americans. http://en.wikipedia.org/wiki/Gary_McKinnon