Andy Pettitte

Andy Pettitte told congressional attorneys that he received HGH from his father. (AP)

April 16, 2012 5:22:26 PM PDT
Clemens' fellow pitcher for the New York Yankees and Texas Rangers is another vital prosecution witness. The quick end to Clemens' first trial came when prosecutors were showing jurors a video of Clemens' congressional testimony.

In the video, Rep. Elijah Cummings, D-Md., was questioning Clemens and pointed out that Pettitte says Clemens admitted using human growth hormone in a private conversation in 1999 or 2000. Clemens responded that Pettitte "misheard" or "misremembered" their conversation.

But Cummings said Pettitte's wife, Laura, has given lawmakers an affidavit saying that her husband told her about the conversation with Clemens at the time it happened. Walton ruled the day before the trial began that Laura Pettitte's comments were inadmissible hearsay because she didn't speak to Clemens directly.

Clemens attorney asked for a mistrial and Walton granted the motion, saying Clemens couldn't get a fair trial with a jury that had seen the video.

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