Iowa Constitutional provision (section 11) establishing
grand juries to indict for serious crimes
from the Iowa Judicial Branch answering questions such as the difference between
a petit and a grand jury.
FAQ about jury service in Iowahttp://www.judicial.state.ia.us/faq/jury.asp
Follow this link to
open a .pdf file (requiring Adobe Acrobat
to view) and read Rule 3 of the Iowa Rules of Criminal Procedure -- Rule 3
governs grand juries.