This is the part that concerns me as well.
How was your Jury pool selected?
Also, WTH is a Grand Jury doing handing down awards/penalties?
Usually they are very selective with the grand jury. When I got summoned, they had over 100 people scheduled that day, and only chose a few. Most don't get chosen.
They don't do anything but decide if there's enough evidence to convict. The judge told us if selected we could be looking at 40 cases a day. And that it's from a one sided perspective. Only that of the officers/prosecutors. Since there are no charges yet, you're not looking at any defense statements. Just the evidence that's been collected.
Anyways, they have TONS of reasons to rule someone out. They get you all in a group. Assign you all a number, and ask a bunch of group questions and you'll raise your hand or chime in.
I was excused, for example, because I told them I don't think I could fairly judge drug addicts. I am a sober ex addict and it might effect my judgement.
They go through and screen For stuff like this too, but they also have an open thing at the end where you can just tell them reasons you might not be able to do it. Work hours, new kids, bias against the system, family in jail, family in the police dept, etc. They screen for all that.