At one time in this country's history the grand jury exercised independent judgment and was held out as a bulwark protecting citizens from overzealous prosecutors. This is one of the reasons why the Right to Grand Jury was enshrined in the 5th Amendment of the U.S. Constitution.
Well, those days are long gone and are unlikely to return any time soon. Today's grand jurors rarely if ever exercise independent judgment and as illustrated by the article below now basically serve as adjuncts of the prosecution. This in turn raises the question of whether society even needs grand juries. I have long argued that if we are going to have grand juries then they need their own legal advisor. They can't rely on the prosecutor who has a vested interest in the outcome of the case.