If the victim is a federal official, an ambassador, consul or other foreign official under US protection, then the federal government has jurisdiction. If the the crime took place on federal property or involved crossing state lines it is under federal jurisdiction. Murder on naval or U.S. flagged merchant vessels in international waters is under federal jurisdiction. This is true also if crime happens on U.S. military bases worldwide. Murder by a member of the United States military anywhere in the world is a violation of Article 118 of the Uniform Code of Military Justice. The trial is held by a general court-martial. 