A trial jury is a group of citizens selected to hear evidence in a legal case and make a decision based on that evidence. Typically consisting of 6 to 12 members, the jury listens to testimonies, reviews evidence, and deliberates to reach a verdict. Their primary role is to determine the facts of the case and apply the law as instructed by the judge. In the United States, trial juries are commonly used in both criminal and civil cases. The right to a trial by jury is guaranteed by the Sixth Amendment for criminal cases and the Seventh Amendment for civil cases, ensuring that citizens have a voice in the judicial process.