A person arrested on a presentment is examined before a justice of the peace or other magistrate, as if arrested on a complaint.

Neither an indictment nor a presentment can issue except upon concurrence of the number of grand jurors specified by statute.

Under former practice the jury numbered twenty-three and the concurrence of twelve was necessary.
The grand jury is bound to investigate the charge against any one held by a justice "to await the action of the grand jury;" also any charge brought by a member of the grand jury.

And conversely it is the sworn duty of each member to report any crime known by him to have been committed within the county.

Any outsider may file information or bring charges, but the grand jury may use its own judgment as to the necessity of investigating them.
Petit Jury .-- A petit jury is a body of twelve men impaneled and sworn in a district court to try and determine by a true and unanimous verdict, any question or issue of fact, in any civil or criminal action or proceeding, according to law and the evidence as given them in court.
The mode of selecting petit jurors is in general the same as that pursued in selecting grand jurors.