Re: Grand Jury...
No judicial system is going to be perfect. The grand jury system is designed to limit malicious prosecutions. Since merely charging someone with a crime can destroy their reputation, and with it, their ability to make a living--not to mention costing them thousands in legal fees--this requires that the State demonstrate that it has actual evidence that could convict before filing charges. That is all.
I had a friend who served on a federal grand jury. It was for 15 months. At the end, she stated that several members asked if they could continue. So, not such a terrible thing to be a part of.
And as for the "ham sandwich" quote, she also related that the BATF got 0 indictments.