In a Constitution based system such as ours in the U.S. the lowly juror has more power than Congress, more power than the Supreme Court, even more power than the President.  If they will but use it.  Most jurors are completely unaware of just how much power they have.  The juror is the last, and ultimate authority over not just guilt and innocence.  The juror is the last and ultimate authority over the law and the courts, government, and the entirety of the citizenry.