There are several documents that provide information about the Grand Jury:

• General Information
• History of Mendocino County Grand Jury Investigations (pdf)

• Serving on the Grand Jury
• The Selection Process
  

• Procedures of the Mendocino County Grand Jury (pdf)
• Codes of the Grand Jury (pdf)

• Submit a Complaint for the Grand Jury to Consider
  

— Free software is required to read PDFs.