What Should You Do If You Are Contacted by CID, OSI, NCIS, or Other U.S. Military Investigators in Korea?

Short Answer

If you are contacted by CID (Army Criminal Investigation Division), OSI (Air Force Office of Special Investigations), NCIS (Naval Criminal Investigative Service), MPI (Military Police Investigations), or another U.S. military investigative agency in Korea, you should first determine why you are being contacted and what legal process may apply before making statements or providing documents.

Depending on the circumstances, a matter may involve U.S. military investigative procedures, the Korea–U.S. Status of Forces Agreement (SOFA), Korean criminal procedure, or a combination of these. Early legal advice is often important because statements, electronic evidence, and other materials provided at an early stage may significantly affect the direction of the case.

Who May Be Contacted by U.S. Military Investigators?

Investigative agencies such as CID, OSI, NCIS, and MPI investigate a wide range of matters involving U.S. military personnel and activities in Korea.

Depending on the circumstances, investigations may involve:

• U.S. service members;
• civilian employees;
• government contractors;
• subcontractors;
• family members;
• Korean nationals working with or supporting USFK; or
• other individuals connected to U.S. military operations.

Being contacted by an investigator does not necessarily mean that you have committed an offense. You may be contacted as a witness, a reporting party, or a person possessing relevant information.

Can Korean Law Also Apply?

Yes.

Many matters arising in Korea may involve both U.S. military procedures and Korean law. Depending on the nature of the alleged conduct, issues concerning criminal jurisdiction, custody, and investigative authority may arise under the Korea–U.S. SOFA.

Accordingly, determining which authorities are involved—and whether Korean prosecutors or police are also participating—is often one of the first issues that should be clarified.

Should You Immediately Answer Questions or Provide Documents?

Not necessarily.

Before participating in an interview or voluntarily providing documents or electronic devices, it is generally advisable to understand:

• why you are being contacted;
• whether you are considered a witness or a subject of investigation;
• whether Korean authorities are also involved;
• what documents or electronic information are being requested; and
• how the requested information may later be used.

Depending on the circumstances, it may be appropriate to obtain legal advice before responding to substantive questions or voluntarily producing evidence.

What About Phones, Computers, or Electronic Evidence?

Special care should be taken when investigators request access to mobile phones, laptops, email accounts, cloud storage, or other electronic information.

Electronic evidence frequently contains large amounts of personal and business information unrelated to the investigation. Before voluntarily providing access to digital devices or accounts, it is generally advisable to understand:

• exactly what information is being requested;
• whether the request is limited in scope;
• whether copies will be made;
• how the information may be preserved or reviewed; and
• whether any legal rights or obligations apply.

Early advice can help avoid misunderstandings regarding the scope of voluntarily disclosed information.

What Information Should You Gather?

If possible, preserve all relevant information, including:

• the name of the investigative agency;
• the investigator's contact information;
• any written notice, subpoena, or interview request;
• the date and location of the requested interview;
• any request for documents or electronic devices;
• communications already exchanged with investigators; and
• any related employment or contract issues.

Preparing these materials in advance can assist counsel in evaluating the situation efficiently.

Why Early Legal Advice Matters

Investigations involving USFK, SOFA, and Korean law often raise procedural issues that differ from ordinary domestic criminal investigations.

Depending on the circumstances, early legal advice may help:

• identify the applicable legal framework;
• determine whether Korean authorities are involved;
• preserve relevant evidence;
• evaluate requests for interviews or documents;
• protect procedural rights; and
• develop an appropriate response strategy before the investigation progresses.

The appropriate approach varies significantly depending on the individual's status, the investigating agency, and the nature of the allegations.

Conclusion

Being contacted by CID, OSI, NCIS, MPI, or another U.S. military investigative agency does not necessarily indicate criminal liability, but it should always be taken seriously.

Because these matters may involve U.S. military procedures, SOFA, Korean criminal law, and electronic evidence, obtaining legal advice before making statements or voluntarily providing documents is often the most effective way to protect your legal interests and respond appropriately to the investigation.