The Roger Clemens perjury trial was not looking good for Rocket up until today. There was a mostly female jury seated for the trial, which probably wasn't going to be favorable for Clemens. He was maybe going to have to defend himself without actually testifying. But, a development early in the prosecution's presentation Thursday may have swung things in the opposite direction.

U.S. Assistant Attorney Steve Durham showed the jury a video of Clemens' testimony that got him in trouble. In the video, one of the congressional questioners brings up Andy Pettitte, after the judge in the case specifically ruled that was going to be out of bounds for this trial. 

Clemens attorney Rusty Hardin immediately ruled for a mistrial based on the jury seeing that evidence against the judge's rules. It also sounds like he might get it, as the Clemens camp thinks that the Pettitte testimony will be critical to sending Rocket to prison.

If this happens, it'll be a huge win for Clemens. He was basically painted into a corner and may be saved by a technicality. Stay tuned for more developments as the day goes along.