Civilians are subject to the criminal laws of Korea.
For crimes that occur off base and against a Korean national, Korea has primary jurisdiction to punish a U.S. military or civilian person. Americans foolish enough to test this system may find that Korea is not overly concerned with rehabilitation and considers jail simply as punishment. For example, while you have the right to remain silent, police may continue interrogating you as they see fit. Also, if you choose to remain silent, your silence can be used against you in court. You also have the right to an attorney, but the police are under no obligation to give you money to call one, nor must they suspend questioning until one arrives.