When Does the Defense Need an Expert?

Independent Military Defense Investigations

Supporting Attorneys, Service Members, and Families

Publication Date: August 23, 2026

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Executive Summary

Investigators are trained to develop facts, but they cannot responsibly answer every scientific, medical, technical, financial, or digital question. Recognizing when ordinary investigative work has reached a specialized boundary is part of professional judgment. This publication explains how a defense team defines the technical issue, assesses its materiality, preserves the necessary evidence, and gives an expert a neutral assignment.

The decision to seek expert assistance should begin with a specific technical question, not simply with the fact that the government used an expert. Specialized review is most valuable when the issue could materially affect identity, causation, timing, authenticity, injury, or another disputed fact. Original data, records, photographs, physical evidence, measurements, and chain-of-custody information should be preserved so the expert can perform a meaningful independent analysis.

Knowing when an investigative question has become a technical question is part of professional judgment.

Who Should Read This Publication?

Military defense counsel deciding whether specialized assistance is necessary
Defense investigators who encounter technical questions beyond ordinary investigative methods
Service members whose cases involve disputed forensic, medical, digital, financial, or scientific evidence
Experts receiving materials or assignments from a defense team
Families trying to understand why specialized review may be important

Download the Official Authority Publication (PDF)

Companion Video

This companion video expands on the investigative concepts presented in this Authority Publication through additional explanation, practical examples, and professional investigative insight.

About Michael West

The investigative guidance presented throughout these Authority Publications is based upon decades of professional experience conducting military, federal, criminal, civil, and private investigations. The principles discussed in these publications are drawn from real investigative work involving complex cases, witness development, evidence analysis, and factual case preparation.

Michael West has served as a Special Agent with the United States Air Force Office of Special Investigations (AFOSI) and the Department of Defense Inspector General, conducted federal background investigations, and spent decades working as a licensed private investigator supporting attorneys, businesses, service members, and private clients. Throughout his career, his work has focused on identifying facts, locating witnesses, analyzing evidence, and strengthening the factual foundation of legal cases through independent investigation.

The Military Defense Investigation Knowledge Base was created to share that investigative experience in a practical, understandable format. Its purpose is to help attorneys, service members, and families better understand the investigative process, ask more informed questions, and recognize opportunities where independent investigation may strengthen the defense.

Important Information

This Authority Publication is provided for educational and informational purposes and is intended to help readers better understand military defense investigations and the investigative process. It is based upon professional investigative experience and is designed to provide practical investigative insight rather than legal advice.

Every military case is unique. The investigative strategies, factual issues, and legal considerations applicable to one case may not apply to another. Readers should consult with a qualified attorney regarding legal rights, legal strategy, and decisions involving their individual circumstances.

Nothing contained in this publication should be interpreted as creating an attorney-client relationship or an investigator-client relationship. References to investigative techniques, procedures, or case examples are provided solely to illustrate investigative principles and should not be considered legal guidance.

Effective military defense is strengthened by informed legal representation supported by thorough factual investigation. The purpose of these Authority Publications is to help readers better understand that investigative process so they can communicate more effectively with qualified legal counsel and make informed decisions throughout the military justice process.