Miranda Rights & Suppression: Constitutional Warnings Before Custodial Interrogation

In the landmark 1966 decision *Miranda v. Arizona*, 384 U.S. 436, the United States Supreme Court established a bedrock rule of criminal procedure: before subjecting a suspect to custodial interrogation, law enforcement must inform them of their constitutional rights under the Fifth and Sixth Amendments. Failure to provide these warnings—colloquially known as "reading the Miranda rights"—can render any resulting confession or incriminating statement inadmissible in court.

The Court in *Miranda* required that suspects be informed of the following rights before any custodial questioning begins: 1. The Right to Remain Silent: You have the right to remain silent. Anything you say can and will be used against you in a court of law. 2. The Consequences of Waiver: Anything said after waiving the right to silence can be introduced as evidence. 3. The Right to an Attorney: You have the right to an attorney. If you cannot afford an attorney, one will be appointed for you before any questioning if you wish. 4. The Right to Stop Questioning: You may exercise these rights at any time and terminate the interrogation until an attorney is present.

The exact wording of these warnings is not constitutionally mandated—law enforcement has flexibility in phrasing—provided the warnings "adequately and fully appraise a defendant of his rights" as required by *Miranda*.

Miranda warnings are only required when two conditions are simultaneously met:

• Custody: The suspect has been formally arrested or their freedom of movement is restrained to the degree associated with a formal arrest. A person is in custody if a reasonable person in their position would not feel free to leave.
• Interrogation: The suspect is subjected to express questioning or its functional equivalent—meaning words or actions by police that they should know are reasonably likely to elicit an incriminating response.

• *Important: Miranda warnings are NOT required during:
• General on-scene questioning at a crime scene.
• Routine traffic stops (unless the driver is formally arrested).
• Booking procedures (name, address, date of birth).
• Spontaneous statements made without police questioning.

A suspect may waive their Miranda rights, but only if the waiver is:

• Voluntary: Free from coercion, threats, or improper promises.
• Knowing: Made with a full awareness of the nature of the right being waived.
• Intelligent: Made with an understanding of the consequences of waiving the right.

A waiver need not be explicit. Courts have held that a suspect who is read their rights, acknowledges understanding, and then proceeds to answer questions has implicitly waived their right to silence. However, ambiguous invocations of rights create significant legal complexity—in *Berghuis v. Thompkins* (2010), the Supreme Court held that a suspect who did not explicitly invoke the right to remain silent was not protected simply by staying silent for hours before making statements.

Once a suspect clearly and unambiguously invokes their Fifth Amendment right to silence or their Sixth Amendment right to counsel, all questioning must cease immediately:

• Invoking Silence: Police must "scrupulously honor" the invocation and cannot resume interrogation until a "significant time" has passed and new Miranda warnings have been given.
• Invoking Right to Counsel: Under *Edwards v. Arizona*, all interrogation must stop permanently until counsel is present. The suspect must initiate further communication themselves.

When police conduct a custodial interrogation without providing Miranda warnings, or continue questioning after a suspect invokes their rights, the resulting statements are subject to suppression at trial.

The defendant's attorney files a Motion to Suppress the statements. At the suppression hearing, the prosecution bears the burden of proving by a preponderance of the evidence that: 1. The defendant was not in custody, or 2. Miranda warnings were properly given, and 3. The defendant knowingly and voluntarily waived those rights.

If the motion is granted, the statements—and potentially any evidence discovered as a direct result (under the fruit of the poisonous tree doctrine)—are excluded from trial.