Final answer:
An omissive response from a subject to an interrogator's question implies non-involvement without the use of words.
Step-by-step explanation:
An omissive response from a subject to an interrogator's question implies non-involvement without the use of words. This can be observed through the subject's body language, such as avoiding eye contact, fidgeting, or appearing distracted or bored. By paying attention to these visual cues, an interrogator may infer when the subject is not willing to provide more information or is uninterested in answering further questions.