So much to respond to.
@ BK: I agree the providence of the juror's verdict shouldn'tt be disturbed. I don't think I ever said otherwise, even when the resuls comes from jury nullification. I do disagree with the prospect that jury nullification is still occassionally ok today, even though its results must be ratified. Has juror nullification ever avoided an injustice? Of course, and you've given several examples. But nullification i'd argue creates many more injustices than it solves. Don't write off To Kill a Mockingbird type verdicts as a relic of racist juror selection. That can still happen today based on issues as race, or simply "we all agree we have a really bad feeling about this guy, and it's not like they didn't present ANY evidence of his being the one, so...". (And no, BRTD, don't mistakenly believe a jury's decision alone can be "easily appealed and overturned".
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@ Dues Naturae: If you can't wholeheartedly follow the law as the judicial system tells you it is rather than what you think it is (or want it to be), you shouldn't be a juror, period. No offense, but it'd be the height of presumption for either one off us to decide we know what the Constitution REALLY means better than the entire silly ol' judicial system. The whole concept of our system is based on evryone deciding cases on a given set of rules and standards rather than each juror going off on their own tangent about what they individually believe is right or wrong and waht the Constitution 'really' says.
@ BRTD: I actually somwhat agree with you in that if the State (or Defense; everyone keeps mistakenly assuming nullification only screws the prosecution) allows a juror on a case without hitting on a particular issue that may trigger a nullification verdict, then yes the State MAY have failed based on the degree of questioning. Parties are limited in the amount of detail about the case they can discuss with jurors during voir dire. An attorney may be prohibited from going into the particular point that ultimately triggers a 'hell no, never" response from a particular juror.
Especially when the juror, you know, swore an oath to follow the law and the attorneys, God forbid, believed them. So even if a nullification prone juror gets seated due to limited voir dire (regardless whether limited by the Court or the failings of counsel) is still absolutely no excuse for a juor to then violate their oath to follow the law. For Pete's sake one could come forward even after the trial (or even deliberations) have started and be replaced. That's why there are alternate jurors selected. Even if all alternates were excused, better to come forward and cause a mistrrial so a truly impartial jury can rehear the case later. But to actively and illegally participate in tampering with the justice system by replacing--as opposed to supplementing--the law with personal individual values is just plain wrong.