There is another person that has knowledge about steroid use by Roger Clemens

Federal prosecutors hope that the judge Reggie Walton will permit the former Major League Baseball player David Segui to provide testimony in the trial related to the case of Roger Clemens. This person had a conversation with Brian McNamee, the former trainer of Roger Clemens. It is claimed that they have spoken about usage of steroids by the former famous baseball player.
Brain McNamee was called to testify against Roger Clemens because he turned out to be the only person who had direct knowledge about usage of steroids and other related products by Clemens. Furthermore, he kept a beer can with vials, syringes and needles that were allegedly mixed with Roger Clemens’ blood. DNA analysis was conducted in order to determine whether it was Clemens’ blood.
Rusty Hardin, a defense attorney for Roger Clemens, said that the steroid evidence was thought up by Brian McNamee after the questioning by federal prosecutors.
But prosecutors claimed that David Segui told them that Brian McNamee said that he saved certain things as evidence of steroid use by certain players in 2001. It was some years before Roger Clemens’ former trainer became the target of the investigation.
Information provided by David Segui to federal prosecutors differed essentially from that provided to the sportswriter Jim Baumbach. His statements presented to Jim Baumbach were published in an article in 2008. According to that article, David Segui confirmed that he had never spoken about steroids with his friend Brian McNamee.
David Segui learnt about involvement of Brian McNamee into the case of Roger Clemens just in 2006, when he read an article in the Los Angeles Times.
Segui discussed openly about personal application of steroids and other performance-enhancing drugs. He said that he had been asked many times by players of the Major League Baseball whether he had utilized steroids. This person admitted that he had taken them. But David Segui noted that he had never discussed about intake of steroids with Brian McNamee.
David Segui supported the decision of McNamee to keep evidence about usage of prohibited substances by his clients. According to the former first baseman of the Major League Baseball, it is a correct decision because sometimes innocent persons are blamed but guilty persons are covered. Thus, Brian McNamee could help to support the truth.
However federal prosecutors asked the judge Walton to permit Segui to provide testimony in the trial connected with Roger Clemens, it is unclear yet whether the judge will allow it.