But,on Thursday, the 61-year-old Taylor rejected the allegations of a prosecution witness who said Taylor had transported arms to Sierra Leone by road.

VOA: standard.2009.07.31

A prosecution witness alleged that the former Liberian president to Voinjama, had traveled on the road the main city in northern Liberia, close to the borders of Guinea and Sierra Leone, a day earlier.

VOA: standard.2009.09.23

And much of Wednesday's hearing was devoted to questioning a potential expert witness for the prosecution, Evan Kohlmann, an international terrorism expert who apparently examined the contents of a laptop belonging to Hasan.

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That would change Mr. Pettitte's role in the trial from that of a key prosecution witness to an asset for the defense.

WSJ: Pettitte Says He May Have Misunderstood Clemens

To make this case in any courtroom would be very difficult for a prosecutor -- who point out that it is difficult, if not impossible, to put on a successful prosecution if the chief witness is deemed by the prosecutors to be unreliable on some issues, but presented as totally truthful on others.

CNN