The Federal District Court is the lowest level of the Federal Court system. Each district has at least one District Court that handles all federal cases within its jurisdiction through jury trials. Judges are appointed for life by the President and interpret the law to determine guilt, innocence, and punishments. The Federal Appeals Court is the next level that only has appellate jurisdiction and reviews cases for unfairness or errors through written briefs and oral arguments before panels of judges, who can uphold, overturn, or remand lower court decisions.