When Should the Defense Re-interview a Witness?

Executive Summary

Knowing when to re-interview a witness can be critical as new evidence,, inconsistencies, and unanswered questions emerge during a military defense investigation. A witness interview should not always be treated as a one-time event. As an investigation develops, new documents, additional witnesses, digital evidence, or a clearer understanding of the timeline may raise questions that could not have been addressed during the original interview.

A carefully planned re-interview gives the defense investigator an opportunity to clarify important details, explore newly discovered information, resolve meaningful inconsistencies, and test earlier statements against evidence developed later in the investigation. The purpose is not to pressure a witness into changing an account or to repeatedly ask the same questions hoping for a different answer. It is to determine whether additional investigation can improve the accuracy and completeness of the factual record.

Timing and preparation matter. Before returning to a witness, the investigator should understand exactly what new information justifies another interview, what questions remain unresolved, and how the witness’s answers may affect other investigative leads.

A productive re-interview builds upon the first interview rather than simply repeating it.

Experienced investigators evaluate credibility by testing what a witness says against observable facts. That includes examining the witness’s opportunity to observe an event, internal consistency, corroborating records and physical evidence, timelines, prior statements, and other independently established facts. An honest witness can be mistaken, while a confident witness can provide an inaccurate account.

In military defense investigations, the objective is not simply to decide whether a witness is believable. It is to determine which portions of an account are supported, which require additional corroboration, and which remain uncertain. This Authority Publication explains how investigators objectively assess witness credibility and why evidence—not personality—must drive that assessment.