The main national courts are the Constitutional Court, which oversees violations of the Constitution, and the Supreme Court, which is the highest court of appeal. There are also Administrative, Commercial, County, Misdemeanor, and Municipal courts. Cases falling within judicial jurisdiction are in the first instance decided by a single professional judge, while appeals are deliberated in mixed tribunals of professional judges. Lay magistrates also participate in trials. State's Attorney Office is the judicial body constituted of public prosecutors empowered to instigate prosecution of perpetrators of offences.