The two twelve-year-old witnesses proved unable to tell police investigators what happened.

Then I shall produce witnesses to prove that the manuscript is mine.

The next witness proved the finding of the knife near the corpse.

Any witness who saw the offence could prove this point.

True, those many witnesses were proving hard as hell to track down.

I had no witnesses to prove my existence in another place.

I know that he did meet and speak with his killer, a witness can prove that.

However, such a witness can still prove the will (s.15).

I'm sure I can find witnesses to prove you wrong.

Both produced witnesses and letters to prove their cases.