Which statement accurately describes a Miranda waiver?

• A. Miranda warnings are not required if the suspect is not in custody.
• B. A waiver occurs automatically if the interrogation proceeds for a long enough period.
• C. Waiver occurs if the suspect knowingly and voluntarily relinquishes rights after being informed of them.
• D. Miranda rights never apply to interrogations regarding non-criminal matters.

Answer: (C)

A valid Miranda waiver happens when a suspect, after being informed of their rights, knowingly and voluntarily relinquishes those rights and agrees to answer questions. The key elements are that the person understands the rights (knowledge) and makes a free, voluntary choice to give them up (voluntariness). A waiver can be explicit or implied by conduct—if the suspect speaks after warning and demonstrates understanding without coercion, that can constitute a valid waiver. It isn’t automatic just because the interrogation lasts a long time, and it isn’t required only when custody exists or not.

Why the other statements don’t fit: warnings aren’t a blanket trigger for a waiver; a long interrogation doesn’t by itself create one; and Miranda applies to custodial interrogations in criminal matters, not to non-criminal matters in a blanket sense.