Article III establishes the court system in the country, including the Supreme Court. After a court case, you can appeal the decision to a higher court. Seeing as the supreme court is the highest in the country, their decisions are not easily appealed. Supreme Court justices are appointed by the president, and are allowed to stay for life. There are 8 justices and 1 chief justice, for a total of nine. The only crime mentioned in the Constitution, treason, is defined in Article III.