The authority of a service member to detain another person is not a matter of paperwork in the way many people imagine. There is generally no warrant, written order, or signed form that a service member must carry in order to take someone into custody under military law. The lawfulness of a detention, properly called an apprehension in the military system, rests on two things: whether the person doing it holds apprehension authority under regulations governing the armed forces, and whether there is probable cause to believe an offense has been committed and that the person to be apprehended committed it. Understanding both is essential before any service member places hands on another individual.
Apprehension is the military term
Under the UCMJ, the act of taking a person into custody is called apprehension. Article 7 of the UCMJ, codified at 10 U.S.C. 807, defines apprehension as the taking of a person into custody, and the procedures are developed further in the Rules for Courts-Martial, particularly the rule governing apprehension. An apprehension is accomplished by clearly notifying the person that they are being taken into custody. That notice can be given orally or in writing, and in some circumstances it may be implied by the surrounding conduct. The point is that apprehension is an act and a status, not a document.
Who has the authority to apprehend
The first question is always whether the person making the apprehension is authorized to do so. Authority does not flow simply from being in uniform. It flows from law and regulation. Several categories of personnel carry apprehension authority.
Military law enforcement personnel, such as military police, master-at-arms, security forces, and criminal investigators, are authorized to apprehend persons subject to the UCMJ in the course of their duties. Commissioned officers, warrant officers, petty officers, and noncommissioned officers also possess authority to apprehend persons subject to the code, and they have specific authority to quell quarrels, frays, and disorders among persons subject to the code and to apprehend those who take part. Commanders and their authorized representatives may direct apprehensions. Civilian law enforcement officials may, in defined circumstances, apprehend or detain service members and turn them over to military authorities.
A frequent misunderstanding is that any service member, regardless of rank or role, can detain anyone they suspect of misconduct. That is not correct. The authority is tied to status and role. An enlisted member who …