What should you do if you are called to jury duty and are faced with being placed on a criminal case against someone you think is being prosecuted under an unjust law, such as a law against adult unmarried cohabitation, or against
polyfidelity (as Utah has had on the books), or against
consanguinamory?
NOTE: THIS IS A PHILOSOPHICAL ESSAY, NOT LEGAL ADVICE.
The Basics of Criminal Case Juries in the US
Here in the US, people being accused of criminal activity have a right to a trial by jury or they can go with having a judge decide their case. If they go with a jury trial, the judge pretty much acts like a referee until the jury reaches a decision. The decision will be in the hands of the jury, not the judge. The judge should give you no indication of whether they think the defendant is guilty or not.
For a criminal conviction, the jury of twelve people has to unanimously decide the person on trial is "guilty" and it is supposed to be because the prosecution proved their case for guilt "beyond a reasonable doubt." If just one person (or, up to eleven people) on the jury says "not guilty" and won't budge, the case ends in a mistrial and the prosecutor can try again with another jury. If all twelve say "not guilty" then the accused is cleared of that crime and can't be retried for the same crime for the same incident. People can appeal after they've been convicted of a crime, but their appeal usually won't get them cleared.