What if a jury decides that an innocent person is guilty of murder? It was the jury’s opinion that the defendant was guilty (”truth”). Their perception(s) of evidence presented by the prosecution and defense could have differed and resulted in a mistrial but through coercion or just one person changing his or her mind, the verdict came out as “guilty”. However, years later a successful appeal(s) or overturning of a verdict is achieved based on DNA evidence (truth) that was not procurable at the time of the original conviction. So, what was the truth and when did they really know it?
The jury verdict in either case is the collective opinion of the jury. It does not alter the truth of what actually happened.