Evidence, Witnesses, and Warnings - S-1 Procedural Page

Role and responsibility

The investigating officer (IO) applies the evidence and witness rules per JAGINST 5800.7GJAGINST 5800.7G Chapter II section 0207 (Standards of Proof and Evidence). The legal advisor briefs the IO on the witness warning rules per section 0207.c and the Privacy Act framework per section 0207.e and 5 USC 552a5 USC 552a. The IO advises parties of rights per Appendix A-2-c (Parties - Definitions and Rights). The convening authority (CA) reviews evidence and witness documentation for sufficiency per section 0223 (Action by Reviewing Authorities). The S-1 officer signs by direction on evidence logistics. The S-1 chief maintains the chain of custody on physical evidence.

Source documents flow from the convening order per JAGMAN 0206, the witness list, the physical evidence collected, the witness statements per JAGMAN 0207.c, the Privacy Act Statements per Appendix A-2-i, the Privacy Act Record of Disclosure per Appendix A-2-j, the Origin of Disease or Injury Warning per Appendix A-2-k (when applicable in LOD investigations), and any prior-investigation witness statements per JAGMAN 0207.d. Evidence and witness outputs include the signed witness statements with warning advisement when applicable, the certified evidence log with chain of custody, the Privacy Act Statement attachments, the Privacy Act Record of Disclosure, and the parties' rights advisement record.

Per JAGMAN section 0207.a (Standards of Proof), administrative investigations apply the preponderance of the evidence standard. Per section 0207.b (Evidence), the IO gathers documentary, physical, and testimonial evidence. Per section 0207.c (Witnesses and Warnings), the IO applies the specific warning rules covering Article 31(b) UCMJ rights, suspect status changes, and the Origin of Disease or Injury warning per Appendix A-2-k. Per section 0207.e (PII and the Privacy Act), the IO handles PII per 5 USC 552a and the appendix-driven statements.

Trigger events

• IO appointment per JAGMAN 0206 triggers evidence and witness planning.
• Witness scheduled for interview.
• Physical evidence collected at incident site.
• Witness changes from witness to suspect during interview triggering Article 31(b) warning.
• LOD or misconduct investigation triggers Origin of Disease or Injury warning per Appendix A-2-k.
• Privacy Act disclosure request received.
• Prior NCIS or other-investigation witness statement available for inclusion per JAGMAN 0207.d.

Processing workflow

1. Apply the preponderance standard. Per JAGINST 5800.7GJAGINST 5800.7G Chapter II section 0207.a, the IO weighs evidence on the preponderance standard (more likely than not).
2. Gather and document evidence. Per JAGMAN section 0207.b, gather documentary (orders, records, photographs), physical (objects, samples), and testimonial (witness statements) evidence. Log every item with date, source, and chain of custody.
3. Apply the witness warning rules. Per JAGMAN section 0207.c (Witnesses and Warnings), the IO applies warnings per the witness category. Suspects receive Article 31(b) UCMJ warning. Service member witnesses on personal misconduct receive a warning per the section rules. Civilian witnesses run under different rules.
4. Use prior-investigation witness statements. Per JAGMAN section 0207.d (Witness Statements from Other Investigations), the IO is permitted to incorporate prior NCIS, civilian police, or other investigation witness statements per the section rules and the cross-reference requirements.
5. Apply Privacy Act protections. Per JAGMAN section 0207.e (PII and the Privacy Act) and 5 USC 552a5 USC 552a, attach the Privacy Act Statement per Appendix A-2-i (Sample Privacy Act Statement Format - JAGMAN Investigation) at witness interview when collecting PII.
6. Track Privacy Act disclosures. Per Appendix A-2-j (Sample Privacy Act Record of Disclosure), log every disclosure of PII to non-routine recipients.
7. Apply the Origin of Disease or Injury warning. Per Appendix A-2-k (Sample Warning Advisement About Statements Regarding Origin of Disease or Injury), advise the witness when the investigation touches the origin of a disease or injury affecting benefits.
8. Advise parties of rights. Per Appendix A-2-c (Parties - Definitions and Rights), advise parties of party status, right to counsel, right to call witnesses, right to cross-examine (in Court of Inquiry per section 0211), and right to submit a statement.
9. Maintain chain of custody. Log every physical evidence item with date, time, custodian, and disposition.
10. Document witness signatures. The witness signs the statement under oath at the interview. Witness signatures captured later lose evidentiary force.

Systems of record and forms

Systems

• IO Working File. Holds the evidence log and witness statements.
• Convening Authority Legal Records. Holds the certified evidence file per MCO 5800.16 Volume 1.
• Privacy Act Disclosure Log. Per Appendix A-2-j.
• OMPF Field Folder. Source of personnel record evidence.
• Evidence Locker. Physical custody of evidence per unit control.

Forms

• Witness Statement. Standard witness statement format per JAGMAN 0207.c.
• Privacy Act Statement. Per Appendix A-2-i.
• Privacy Act Record of Disclosure. Per Appendix A-2-j.
• Origin of Disease or Injury Warning Advisement. Per Appendix A-2-k.
• Parties' Rights Advisement. Per Appendix A-2-c.
• Chain of Custody Log. Per evidence handling standards.
• Article 31(b) UCMJ Warning Card. Per the UCMJ statutory requirements when the witness becomes a suspect.

Common pitfalls

• Witness warning skipped when witness becomes a suspect. Per JAGINST 5800.7GJAGINST 5800.7G Chapter II section 0207.c, the IO halts the interview, applies the Article 31(b) UCMJ warning, and resumes per the witness response. A non-warned suspect statement loses force.
• Privacy Act Statement omitted. Per JAGMAN section 0207.e and Appendix A-2-i, the Privacy Act Statement attaches when PII is collected.
• Origin of Disease or Injury warning missed in LOD investigation. Per Appendix A-2-k, the warning applies when the testimony touches disease or injury origin affecting benefits. Without the warning, the witness loses notice.
• Parties' rights advisement missed in Court of Inquiry. Per Appendix A-2-c and JAGMAN section 0211, parties receive a formal advisement. A defective advisement invalidates the record.
• Chain of custody log broken. The evidence loses force. Log every transfer.
• Prior-investigation witness statement incorporated without cross-reference. Per JAGMAN section 0207.d, the cross-reference attaches. A missed cross-reference creates a gap.

Decision points

• Witness category and applicable warning. Per JAGINST 5800.7GJAGINST 5800.7G Chapter II section 0207.c, the IO classifies the witness (suspect, service member, civilian) and applies the matching warning rules.
• Privacy Act disclosure decision. Per JAGMAN section 0207.e, 5 USC 552a5 USC 552a, and Appendix A-2-j, disclosure of PII to a non-routine recipient triggers the disclosure log. The IO coordinates with the legal advisor.
• Prior-investigation statement use. Per JAGMAN section 0207.d, the IO is permitted to use prior statements per the section criteria. The use saves resources but requires cross-reference.
• Origin of Disease or Injury warning. Per Appendix A-2-k, the warning runs when the testimony touches benefits-relevant disease or injury origin. The IO applies preemptively rather than retroactively.

Authority

This sub-page sits under JAGINST 5800.7GJAGINST 5800.7G Chapter II section 0207 (Standards of Proof and Evidence) including subsections a (Standards of proof), b (Evidence), c (Witnesses and warnings), d (Witness statements from other investigations), and e (PII and the Privacy Act). Appendix A-2-c (Parties - Definitions and Rights), Appendix A-2-i (Privacy Act Statement), Appendix A-2-j (Privacy Act Record of Disclosure), and Appendix A-2-k (Origin of Disease or Injury Warning) provide the operating templates. 5 USC 552a5 USC 552a sets the statutory Privacy Act framework, implemented inside the DON by SECNAVINST 5211.5FSECNAVINST 5211.5F paragraph 7. M.R.E. provides background on evidence handling. Administrative investigations apply the JAGMAN rules. M.R.E. governs courts-martial. MCO 5800.16MCO 5800.16 Volume 1 supplements at the Marine Corps level. S-1 responsibilities sit at MCO 5000.14DMCO 5000.14D MCAP enclosure 4. The processing workflow maps to NAVMC 3500.3E T-R event 0102-GENA-1012.

Related references

• JAGMAN section 0207 and subsections a-e. Authoritative evidence and witness rules.
• JAGMAN Appendices A-2-c, A-2-i, A-2-j, A-2-k. Parties rights, Privacy Act Statement, Privacy Act Disclosure, Origin of Disease or Injury Warning samples.
• 5 USC 552a. Privacy Act of 1974.
• MCO 5800.16 Volume 1. Marine Corps legal administration.
• MCO 5000.14D MCAP enclosure 4. S-1 investigation responsibilities.
• NAVMC 3500.3E. T-R event 0102-GENA-1012.