"How he was served struck me as a little peculiar," said Miller who gave evidence for 90 minutes in Los Angeles on Wednesday. "It was affected on a guy at a charity ride who was going to leave Texas for a vacation with his girlfriend. A guy from Ukraine who doesn't speak great English and didn't really understand what was going on."

Miller added that he doesn't think his client has anything to add to the doping investigation. "I don't believe he knows anything about what the grand jury is investigating," he said. Investigators wanted to talk to the 30 year-old Ukrainian cyclist because he has been a rider on three Armstrong teams since 2005, when they both rode for Discovery Channel.

Federal prosecutors have called several associates of Armstrong, a seven-time Tour de France champion, in recent weeks. Investigators have been interviewing witnesses and collecting evidence in their investigation of whether or not Armstrong took banned substances.

Armstrong has repeatedly denied the allegations. Testimony is kept secret and sessions are closed to reporters. The federal investigation was sparked by allegations from Armstrong's countryman and former team-mate Floyd Landis that Armstrong used performance-enhancing drugs.