[Jarhead1957]

No judge is involved in Grand Jury. He appoints them and that is it.

They can look at any fact, or non fact without reguard to how it was gained.

A member of the DA's office is present to guide and present facts.

The Grand Jury can ask the member of the DA's office to leave, and then they are refered to as a runaway Grand Jury.

[lastchance]

Thanks for the information. So it seems the workings of the Grand Jury may and can be politically motivated.
Especially with a member of the DA guiding the Grand Jury.
I think I have read arguments that the Grand Jury system is outdated and should be reformed. But I just can not recall where I saw this.