She would not be a good witness if the case came to trial.

But one good witness isn't the same as a half dozen.

And the killer works in front of two good witnesses.

"She could have turned out to be a good witness."

The guys are good witnesses; the jury believes them and they walk.

They wouldn't make good witnesses for the prosecution or the defense.

He knew, somehow, we had a good witness here, a man who could tell us a lot.

Now all it'd take is one good witness above level six hundred.

He was still shaken but turned out to be a good witness.

She was now under government protection, but not expected to make a good witness.