The district attorney is making at least one big false statement in his complaining or at least conveniently leaving out the whole truth. He states that a jury are "triers of fact". Juries in this country are a final check on the governments power in that they can also decide if the laws being are just that are being used against the people and then find the accused innocent if they determine the laws are not just. The state does not want this information to get out because if the people know this it would give power back to the people.