Hacked into United States Military computers using a commercial trojan. The purpose of these hacks was to find information regarding UFO's, antigravity, and other advanced technology which the government is apparently hiding.
He was caught when someone cared to look at the remote trojan he was using, since it was a commercial product it had a unique number, which then was cross referenced to an email address of his.
Since he lives in Britain, the United States wants to extradite him to charge him with a crime, since the punishment would be much higher under American law than British Law.