Article 31 Rights and Investigations

Start Here If You Are New to Article 31 Rights

Article 31 of the UCMJ is the military version of Miranda rights. It protects you from being compelled to incriminate yourself. When a person subject to the UCMJ (your commanding officer, NCIS agent, CID investigator, MP, or any other military person) suspects you of an offense and is going to interrogate or question you about it, that person must first advise you of three rights. The nature of the offense suspected. The right to remain silent. That any statement you make may be used against you at trial by court-martial. You also have the right to consult with a Defense Counsel before answering questions and to have counsel present during questioning. This page covers when Article 31 applies, what your rights are, when you should invoke them, and how investigations work. The single most important rule. If you are suspected of any offense, REQUEST DEFENSE COUNSEL BEFORE SAYING ANYTHING. Per UCMJ Article 31, Military Rules of Evidence 304-305, JAGMAN, and MCO 5800.16 Vol 11MCO 5800.16 Vol 11.

This page walks you through Article 31 rights from your seat as a General Marine. By the end you will know.

• The three core Article 31 rights
• When Article 31 applies (suspect, interrogation, person subject to UCMJ)
• The right to counsel during questioning
• How to invoke your rights
• The difference between Article 31 warnings and Miranda warnings
• NCIS, CID, MP, and command investigation differences
• JAGMAN command investigations and witness obligations
• What happens if Article 31 is not properly given
• Common mistakes Marines make

Every fact on this page comes from UCMJ Article 31, Military Rules of Evidence 304 and 305, JAGMAN, and MCO 5800.16 Vol 11MCO 5800.16 Vol 11.

The Three Core Article 31 Rights

Per UCMJ Article 31(b), before interrogation begins, the questioner must advise you of.

1. The Nature of the Suspected Offense

You must be told what offense you are suspected of. The advisory must be specific enough for you to understand the subject matter. Vague references like "the incident the other night" are typically insufficient.

2. The Right to Remain Silent

You have the right to refuse to make any statement. You cannot be compelled to make a statement.

3. That Any Statement May Be Used Against You

Anything you say (or write) may be used as evidence against you at trial by court-martial. Including statements that seem helpful to you at the time but later prove damaging.

The Right to Counsel

Beyond the three core Article 31 rights, you have additional rights derived from Military Rule of Evidence 305 and the U.S. Constitution.

Right to Consult With Counsel Before Questioning

Before answering any questions, you have the right to.

• Consult with Defense Counsel (free).
• Consult with a civilian attorney (your expense).
• Consult with both.

Right to Counsel Present During Questioning

You have the right to have counsel present during the questioning itself.

How to Invoke

Say clearly. "I want to speak with a lawyer." or "I want a Defense Counsel." or "I am invoking my right to counsel."

Once you invoke counsel, all questioning must stop until you have spoken with counsel and counsel is present (if you wish).

When Article 31 Applies

Article 31 applies when ALL THREE conditions are met.

Condition 1. The Questioner Is Subject to the UCMJ

The person asking the questions must be subject to the UCMJ. Includes.

• Active duty military.
• Reservists on active duty.
• Cadets and midshipmen.
• Persons in custody serving a sentence imposed by court-martial.

The U.S. Supreme Court extends Article 31 to civilian investigators (e.g., NCIS Special Agents) who are acting under the direction of a military entity for the purpose of obtaining evidence for court-martial use.

Condition 2. You Are a Suspect (or Accused)

You are suspected of an offense. The questioner does not have to formally charge you. The questioner just needs to suspect you. The standard is generally what a reasonable person in the questioner's position would suspect.

Condition 3. The Questioning Is an Interrogation

The questioning is reasonably likely to elicit an incriminating response. Routine administrative questions (name, rank, unit, DoD ID) typically do NOT trigger Article 31. Substantive questions about an alleged offense DO trigger Article 31.

When Article 31 Does NOT Apply

Routine Administrative Questions

Identification, accountability, routine command business.

Voluntary Confessions Not Made During Interrogation

If you walk up to your CO and confess to an offense without being questioned, the statement is voluntary and admissible. Be very careful with voluntary statements.

Statements to Civilian Police Without Military Direction

If state or local police question you about a civilian offense, Miranda rights (not Article 31) apply. Different rules but the underlying right against self-incrimination is the same.

Field Sobriety Tests and Physical Evidence

Article 31 protects testimonial evidence, not physical evidence. Field sobriety tests, breathalyzer, fingerprints, photographs, and DNA samples are not protected. You can refuse some of these but the consequences vary.

Article 31 vs Miranda

Miranda Rights (Civilian Context)

Required when you are in custody and being interrogated by police.

• Right to remain silent.
• Anything you say can be used against you.
• Right to an attorney.
• If you cannot afford an attorney, one will be appointed.

Article 31 Rights (Military Context)

Required when a person subject to the UCMJ suspects you of an offense and is going to interrogate you. Custody is NOT required (Article 31 is broader than Miranda in this respect).

• Right to be advised of the nature of the suspected offense.
• Right to remain silent.
• That any statement may be used against you.
• Right to counsel (derived from Mil. R. Evid. 305 and the Constitution).

Key Differences

• Article 31 applies even without custody. Miranda requires custody.
• Article 31 must specify the offense. Miranda does not.
• Article 31 applies to military and military-directed civilian investigators. Miranda applies to police.

NCIS, CID, MP, and Command Investigators

Different investigators have different roles but Article 31 applies to all.

Naval Criminal Investigative Service (NCIS)

The civilian federal law enforcement agency for the Department of the Navy (Marines and Navy). NCIS Special Agents handle major offenses (felony-level offenses, sexual assault, drug trafficking, financial fraud, espionage, terrorism).

NCIS Practices

• NCIS Special Agents are trained to read Article 31 rights and obtain rights waivers.
• NCIS may interrogate at NCIS offices, on base, or off base.
• NCIS coordinates with command leadership and Trial Counsel.

Criminal Investigation Division (CID)

Army equivalent (in joint contexts) or some service-specific equivalent. Same Article 31 obligations.

Military Police (MP)

Marine Corps and Navy Master-At-Arms (MAA) and other military police handle initial response, traffic offenses, and routine on-base law enforcement. Article 31 applies when MPs interrogate Marines as suspects.

Command Investigators

JAGMAN command investigations may include officers or SNCOs appointed to conduct investigations. Article 31 applies if these investigators interrogate someone they suspect of an offense.

JAGMAN Command Investigations

The JAGMAN (5800.7G) governs command investigations.

Types of JAGMAN Investigations

• Command Investigation. The most common. Command-appointed officer or SNCO investigates an incident.
• Litigation Report Investigation. Specific format for incidents likely to result in litigation.
• Court of Inquiry. Highest-level investigation, rarely convened.

Witness vs Suspect

In a JAGMAN investigation, you may be a witness or a suspect.

• As a witness, you have a duty to provide truthful information. Article 31 may not apply if you are not suspected.
• As a suspect, Article 31 applies and you should consult Defense Counsel before making a statement.

When Status Changes

If during a JAGMAN investigation you become a suspect (or are a suspect from the start), the investigator must read Article 31 rights before continuing substantive questioning.

How to Invoke Your Rights

Step 1. Say It Clearly

"I want to speak with a lawyer." or "I am invoking my Article 31 rights." or "I want a Defense Counsel before I answer any questions."

Make the invocation explicit. Saying "I think I might want a lawyer" is ambiguous and may not stop questioning.

Step 2. Stop Talking

Once you invoke, stop talking about the suspected offense. Polite small talk is OK but anything substantive about the matter waits for counsel.

Step 3. Stay Polite

Invoking your rights is a procedural step. It is not an admission of guilt. Stay calm and respectful with the investigators.

Step 4. Contact Defense Counsel

Coordinate with the unit S-1 to reach Defense Counsel at the installation LSSS or OSJA. Defense Counsel is free.

Step 5. Do Not Re-Initiate Without Counsel Present

After invoking, do NOT re-initiate questioning yourself. If you change your mind and want to talk, do so only with counsel present.

Common Mistakes Marines Make

Mistake 1. Talking to "Get Ahead of It"

Many Marines think talking will minimize trouble. In practice, statements made without counsel often cause more harm than the underlying offense.

Mistake 2. Believing the Questioner

Investigators are trained to develop rapport and may suggest "we just want to clear this up" or "if you cooperate, things will go easier." Statements like these are interrogation tactics, not promises.

Mistake 3. Not Understanding the Right to Counsel

Many Marines do not realize Defense Counsel is free and immediately available.

Mistake 4. Talking After Invoking

Invoking your rights only protects you if you actually stop talking. Continuing to chat substantively after invocation undermines the protection.

Mistake 5. Writing a Statement First

Writing a statement before consulting Defense Counsel is the same mistake as making a verbal statement. Hand-written statements are admissible evidence.

Mistake 6. Discussing With Other Marines

Statements you make to peers about the alleged offense can become testimony against you if those peers are called as witnesses.

Witness Obligations vs Suspect Rights

As a Witness

You have a duty to provide truthful information when properly questioned. Refusing to provide truthful witness statements may itself be misconduct (Article 92 disobedience or related offenses).

As a Suspect

You have the right to remain silent. Article 31 protects you from being compelled to incriminate yourself.

When You Are Both

If you are a witness on one matter but a suspect on another, the rights apply to the matter on which you are a suspect. Communicate with Defense Counsel about the scope.

What Happens if Article 31 Is Not Properly Given

Per Military Rule of Evidence 304, statements obtained in violation of Article 31 are generally INADMISSIBLE at court-martial.

The Exclusionary Rule

If the rights warning was missing or defective, the resulting statement may be excluded from evidence.

Defense Counsel Will Litigate

Defense Counsel evaluates whether Article 31 was properly given and may file a motion to suppress the statement.

Why You Should Still Invoke

Even though improper Article 31 may exclude the statement, the better protection is invocation. Do not rely on a procedural error to save you.

Common Questions Marines Ask

What are Article 31 rights?

The military version of Miranda rights. Three core rights. Nature of the suspected offense, right to remain silent, that statements may be used against you. Plus the right to counsel.

When does Article 31 apply?

When a person subject to the UCMJ suspects you of an offense and is going to interrogate you about it. Custody is NOT required.

Who is subject to the UCMJ?

Active duty military, reservists on active duty, cadets and midshipmen, persons in custody serving a sentence imposed by court-martial. The Supreme Court extends Article 31 to civilian investigators acting under military direction (e.g., NCIS Special Agents).

What is the difference between Article 31 and Miranda?

Article 31 applies in the military context and does NOT require custody. Miranda applies in the civilian context and requires custody. Article 31 must specify the offense; Miranda does not.

Do I have to answer routine administrative questions?

Yes. Name, rank, unit, DoD ID. Article 31 does NOT protect routine administrative questions. It protects substantive interrogation about a suspected offense.

How do I invoke my rights?

Say clearly. "I want to speak with a lawyer." or "I am invoking my Article 31 rights." Make the invocation unambiguous.

Can NCIS interrogate me without reading Article 31?

If NCIS suspects you of an offense and is interrogating you, NCIS must read Article 31 rights first. NCIS Special Agents are trained on Article 31 obligations.

What if I already started talking before realizing I should invoke?

Stop talking immediately. Invoke. Coordinate with Defense Counsel. The earlier statements are admissible evidence but Defense Counsel can evaluate options.

Can I lie if I do not want to answer?

No. Lying to investigators is itself an offense (Article 107 false official statements). The protection against self-incrimination is silence, not lies.

What if Article 31 was given improperly?

The statement may be excluded under Military Rule of Evidence 304. Defense Counsel will evaluate and may file a suppression motion.

Should I make a statement to "tell my side"?

NEVER without Defense Counsel review. The "tell my side" approach almost always hurts more than helps.

Can my command order me to make a statement?

No. A command order to make a statement that incriminates you is not lawful and does not override Article 31. If your command attempts to compel a statement, invoke immediately and contact Defense Counsel.

Where to Go for Help

Routing by Issue

• Defense Counsel for any UCMJ-related questioning. Installation LSSS or OSJA Defense Counsel.
• NCIS interaction. Defense Counsel BEFORE speaking with NCIS.
• Command investigation as a witness. Coordinate with the chain of command, but if you become a suspect, contact Defense Counsel.
• Article 31 violation suspected. Defense Counsel for evaluation and potential suppression motion.
• Personal Services Attorney for general legal questions. Installation LSSS or OSJA.

Where to Go Next on This Site

• Legal Services landing page lists all topics.
• Legal Services Overview and How to Get Help covers the four attorney types.
• NJP (Non-Judicial Punishment) covers Captain's Mast and the right to refuse NJP.
• Court-Martial Process covers the trial framework.
• Administrative Separation covers separation framework.
• Article 138 and IG Complaints covers complaints against superiors.
• Sexual Assault Reporting and Special Victims' Counsel covers victim rights.

Related Roles

• Leaders coach Marines on the importance of invoking Article 31 rights and contacting Defense Counsel.
• Admin at S-1 supports Defense Counsel referrals.
• Commanders ensure investigations comply with Article 31 and that subjects are properly advised.

Article 31, UCMJ is the military version of Miranda rights. Three core rights. Nature of suspected offense, right to remain silent, statements may be used against you. Plus the right to counsel under Mil. R. Evid. 305. Applies when a person subject to the UCMJ suspects you of an offense and is going to interrogate you (custody NOT required). Invoke clearly. "I want a lawyer." Stop talking. Contact Defense Counsel (free). Statements obtained in violation of Article 31 are generally inadmissible. The single most important rule. If you are suspected, REQUEST DEFENSE COUNSEL BEFORE SAYING ANYTHING.