Two other major witnesses have failed to appear as required, the officials said.

Unlike other major witnesses, he was not required to give a sworn deposition before giving his public testimony.

Four major witnesses against Tyler have recanted their testimony since the trial.

They also accused the agencies of failing to provide major witnesses for a Congressional investigation into the matter.

A look at the major witnesses, and which side they benefited:

It's strictly a picture of a dirty cop about to blow away a major witness.

But you now have had the opportunity to observe almost every major witness as he or she testifies.

The names of the five major witnesses are written beneath their pictures.

In recent weeks the prosecutors had to adapt to the loss of a major witness.

He is expected to be a major witness at the first of two trials scheduled in the case.