Former Major League Baseball pitcher Roger Clemens, who is accused of lying to Congress in 2008 when he denied using performance-enhancing drugs, leaves federal court in Washington, Friday, May 25, 2012. A forensic scientist testified Friday that two cotton balls and a syringe needle allegedly saved after a steroids injection tested positive for Roger Clemens' DNA, a key moment as the government tries to prove the former pitcher used performance-enhancing drugs.
