What is Jury Nullification?
You won’t find jury nullification defined in your dictionary or described in your encyclopedia. You weren’t taught about it in school, and indeed it is even considered a crime to tell other people about it in some circumstances. Imagine that for a moment – it is a crime to inform a citizen as to their right, even the scope of their duty while serving on a jury. source
The last stand against tyranny can take place in the jury box. The legislative branch may pass unconstitutional laws and the judiciary branch may uphold them. However, the individual citizen has the last say in the jury box. Learn your rights as a juror. Most likely, you will not be told about them in the courtroom. source