Final answer:
Before questioning a Soldier, the investigating officer must inform them of their Miranda rights, including the right to remain silent, the right to an attorney, and the fact that their statements can be used in court.
Step-by-step explanation:
Prior to questioning any Soldier, the investigating officer must advise them of their rights in accordance with the U.S. Supreme Court decision in Miranda v. Arizona. This includes informing them of the right to remain silent, that anything they say may be used against them in a court of law, the right to consult with an attorney, the right to have an attorney present during questioning, and the right to have an attorney appointed if they cannot afford one. This process of notification is known as 'Miranding' a suspect and is crucial to ensure that the Soldier's constitutional rights are protected under the Fifth Amendment, which guards against self-incrimination and ensures the right to legal counsel.