A petit jury, also known as 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 petit jury is responsible for determining the guilt or innocence of a defendant in criminal cases or deciding liability in civil cases. Their verdict must usually be unanimous, meaning all jurors must agree on the outcome. During a trial, the petit jury listens to testimonies, examines evidence, and follows the instructions given by the judge. After deliberation, they reach a verdict, which is then presented in court. The role of the petit jury is crucial in upholding the right to a fair trial, as guaranteed by the Sixth Amendment in the United States Constitution.