A military attorney’s relationship with criminal investigators depends entirely on which side of the case the attorney is on. For the prosecution, the relationship is collaborative; for the defense, it is adversarial. The same investigative agencies, CID, NCIS, OSI, and others, are engaged very differently depending on whether the lawyer is building the case or testing it.
On the prosecution side: working with investigators
A trial counsel (the prosecutor) works alongside investigators. The interaction is cooperative and legal-quality-focused:
- Advising the investigation. The attorney helps ensure investigative steps are legally sound, search authorizations, rights warnings, and chain of custody, so the resulting evidence will be admissible.
- Reviewing the evidence the investigators develop, assessing whether it supports the charges and meets the legal standard.
- Preparing the case from the investigative file, identifying witnesses and shaping how the evidence will be presented.
Here the attorney’s value is making the investigation legally defensible and the case trial-ready.
On the defense side: testing the investigators’ work
Defense counsel relate to investigators very differently, because their job is to scrutinize what those investigators did:
- Independent investigation. Defense counsel develops the facts on its own, interviewing witnesses and gathering evidence, rather than relying on the government’s account.
- Reviewing the investigative file obtained in discovery to find weaknesses, gaps, unfollowed leads, or unreliable methods.
- Probing how evidence was gathered, looking for unlawful searches, defective rights warnings, or chain-of-custody problems that could support suppression or undermine credibility.
Defense counsel does not direct government investigators; it tests their work.
The common thread: legal soundness
Across both roles, the attorney’s focus is the legal integrity of the investigation, the prosecution to ensure it, the defense to challenge it. That shared focal point, how the evidence was obtained and whether it holds up, is what makes the interaction with investigators central to a criminal case.
Imagine the same investigative file in two hands: the prosecutor works with investigators to make it trial-ready, while the defense scrutinizes how each piece was gathered for a way to challenge it.
The throughline is that the role defines the relationship. A prosecutor works with investigators to make a case legally sound and trial-ready, while defense counsel independently investigates and scrutinizes the investigators’ methods, both centered on the legal integrity of how the evidence was obtained.
Frequently Asked Questions
Does the prosecutor direct the investigation?
A trial counsel works closely with investigators, advising on legal soundness and reviewing evidence to build a trial-ready case, though the investigative agencies conduct the investigation itself.
Can defense counsel use the same investigators as the government?
No. Defense counsel conducts its own independent investigation and obtains the government’s investigative file through discovery, rather than directing the government’s investigators.
Why does defense counsel scrutinize how evidence was gathered?
To find issues such as unlawful searches, defective rights warnings, or chain-of-custody problems that could support a motion to suppress or undermine the evidence’s credibility.
This article is general information about military criminal investigations. It is not legal advice and does not create an attorney-client relationship. Application is fact-specific and procedures can change. Specific cases should be discussed with qualified counsel.
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