When NCIS determined him wasn't military, they reported him to civilian authorities.
海军犯罪调查局查明他不是军方人员以后，将他报告给民政当局。
英语百科
Civil authority
Civil authority or civilian authority, also known as civilian government, is the apparatus of a State, other than its military units, that enforces law and order. It is also used to distinguish between religious authority (for example Canon law) and secular authority. The enforcement of law and order is typically the role of the police in modern states.