What are grand juries?

Grand Jury hear evidence to determine guilty or innocence of a defendant.

A normal (petit) jury hears evidence of a case after the arrest and arraignment of the accused. A grand jury hears evidence before the case is filed and may issue indictments based on the evidence...

Grand jurors are called from a cross section of the public.Added; From the same pool of potential jurors that is used to call all citizens for jury service.

They come from the regular jury pool.

Some states still use the Grand Jury system of indicting criminal defendants. The police arrest a subject - deliver the investigation to the Prosecutor's office - who presents the case to a Grand...