When I lived in Key West I had jury duty. Things went well and it was a fascinating change from jury duty in Philadelphia. In Key West they ask if you have a conviction - if it was for a drug offense, say, and the case was not about drugs... you were good. (based on others situations, not my own!

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One person stated that he didn't feel the US judicial system was proper, or legal or just in any way, shape or form. He felt it was absolutely untrustworthy. The judge told him that was fine, he was still suitable to sit on a jury, and it was up to a lawyer to decide that he was not to be selected for a jury. "You do your duty, as a citizen, by being available for voir dire."
Our case was a bar brawl on Duval. around 70+ bars in a 1 mile street, whodathunkit? The defense attorney started by admitting that the guy had indeed punched the fellow he was arrested and charged with hitting. The thing he went for was that the jury didn't have to decide according to the law, we could decide by "...what was right." his view of what was right was that the guy the defendant hit was a ladies man, danced with about 11 different women in the time of an hour or so and one woman he danced with was the defendent's girlfriend! so it was a defense of " the guy had it coming."
Well, we went into the jury room, first thing choose a foreman. everyone looks around at each other, one guy points at me and says, "I think he should be the foreman, he wore a tie."

That was accepted by acclamation. I asked if anyone had any questions or should we just vote. A vote was also done, out loud because everyone was certain the verdict was guilty.
I went and knocked on the door to bring the bailiff to open it; he asked what we needed. I told him we reached a verdict. His jaw dropped. He glanced over his shoulder and whispered, "Could you just wait a few minutes? so the guy doesn't get embarrassed by it getting done so quickly." I asked him if we could suggest that he sue his defense attorney... The bailiff almost lost it but said no pretty emphatically.
We waited about 5 minutes, knocked again, came out and gave the verdict.
The jury duty I had in NC was a drug case and they plea bargained the second morning due, I think, to the way the jury was seriously paying attention to the testimony; the lawyer must have figured it was lost.