Andy Pettitte at court related to Roger Clemens: I don’t know

The desire of the federal government related to the case of Roger Clemens was following: they desired to prove that this athlete had lied before the Congress about intake of anabolic steroids and HGH. But the government was not able to reach this goal. It was expected that Andy Pettitte would claim that Roger Clemens had acknowledged that he had taken the forbidden medications during a conversation in 1999 or in 2000. But Pettitte shocked the prosecutors. This man claimed that he couldn’t confirm that Roger Clemens had used steroids and HGH because he was not sure.
Actually, why were the prosecutors shocked by the affirmation of Andy Pettittte? This man swore for the 2008 Congressional hearings on administration of steroids in the Major League Baseball that Roger Clemens admitted to usage of HGH. But he presented opposite testimony at the Barrett Prettyman Federal Courthouse in Washington.
Michael Attanasio, a defense attorney for Roger Clemens, asked Andy Pettitte whether he can claim that he is 50-50 that he has misunderstood Roger Clemens about HGH. Andy Pettitte answered that he is indeed 50-50 about this aspect.
When Clemens’ prosecutors heard the answer of Andy Pettitte, they didn’t know what to do. They stated that Andy Pettitte never answered this way, when he was asked several times.
The U. S. District Court Judge Reggie Walton claimed that he understood that Andy Pettitte’s answer has been conflicted. In fact, his statement was following: “I don’t know”.
The attorneys for Roger Clemens utilized the moment of the prosecutors’ confusion. They asked the judge to ignore Andy Pettitte’s testimony because he was 50-50. According to the attorneys, he probably misunderstood the athlete Roger Clemens or he forgot the details of the conversation.  
The government has stated that the jury still allows taking in consideration the affirmation of Andy Pettitte. ASUSA Dunham has claimed that under federal rules jury is allowed to choose which testimony to believe. This person hopes that the jury will brush aside the testimony which doesn’t support the government.
So, the testimony provided by Andy Pettitte and his wife led to problems. Testimonies of his wife during the first trial led to the declaration of a mistrial by the judge Walton.
Pettitte confirms that he is Roger Clemens’ friend. Clemens must also claim that they are friends after the last testimony of Andy Pettitte.