What action must suspects take regarding their Miranda rights for an interrogation to be valid?

For an interrogation to be considered valid in light of Miranda rights, suspects must voluntarily waive their rights. This ensures that they are fully aware of their rights to remain silent and to have an attorney present during questioning. A voluntary waiver indicates that the suspect understands these rights and chooses to relinquish them willingly, which is crucial for the enforcement of both their rights and the integrity of the interrogation process.

If a suspect does not make a voluntary waiver, any statements made during the interrogation may not be admissible in court. This emphasizes the importance of clear communication and understanding between law enforcement and suspects, ensuring that any confession or statement given is done so without coercion or misunderstanding.

Other options, such as signing a written statement, notifying a lawyer, or consenting under duress, do not meet the requirement for a valid interrogation as they do not ensure that the suspect has knowingly and voluntarily waived their rights. Signing a statement might occur after an interrogation but does not fulfill the requirement for the interrogation to be legal, while notifying a lawyer or consenting under pressure could invalidate any statements given.