In a court-martial, a witness whom the defense wants to call may refuse to testify by invoking the privilege against self-incrimination. The defense cannot make that witness talk on its own authority. Immunity, which removes the witness’s exposure so the privilege no longer applies, can only come from the right official under a defined set of standards. Rule for Courts-Martial 704 supplies those standards, and they differ in important ways from the rules that govern immunity for prosecution witnesses. Knowing who may grant immunity, what kind of immunity is available, and what a defense must show to force the issue is essential to understanding this area.
Who may grant immunity
Authority to grant immunity in the military is concentrated in the general court-martial convening authority. Only a general court-martial convening authority may issue a grant of immunity under the UCMJ and Rule for Courts-Martial 704, subject to service regulations and any limits the Secretary concerned imposes. A military judge does not personally immunize a witness. This concentration of authority reflects the view that immunity is a charging and disposition decision tied to the broader interests of justice and good order, which the convening authority is positioned to weigh.
The kind of immunity available
The immunity ordinarily granted in courts-martial is testimonial immunity, also called use and derivative use immunity. Testimonial immunity bars the Government from using the witness’s compelled testimony or statements, and any information directly or indirectly derived from them, against that witness in a later court-martial. It does not bar prosecution of the witness altogether. That broader protection, transactional immunity, prevents prosecution for the offenses about which the witness testifies and is far less common. The distinction matters because a witness granted only testimonial immunity can still be charged based on independent evidence, while the compelled testimony itself remains off limits.
The general rule for defense requests
When the defense wants a witness immunized, the ordinary path is to ask the convening authority to grant it. The convening authority retains broad discretion to decide whether immunity serves the interests of justice. There is no automatic right to have a favorable witness immunized simply because the testimony would help the defense. That discretion, however, is not unlimited, and Rule for Courts-Martial 704 builds in a safeguard against abuse.
When a military judge can intervene
If a defense request to immunize a witness is denied, the defense may move the military judge for relief. The judge may direct that an appropriate convening authority grant testimonial immunity to the defense witness, or, as to the affected charges and specifications, that the proceedings be abated. The judge does this only upon two findings. First, the witness intends to invoke the privilege against self-incrimination to the extent permitted by law if called to testify. Second, the Government has engaged in discriminatory use of immunity to obtain a tactical advantage, or, in some formulations, has otherwise acted so as to deprive the accused of a fair trial.
These two findings set a high bar. It is not enough that the witness would help the defense or that the witness will assert the privilege. The defense must also show governmental misconduct or distortion, typically that prosecutors immunized their own witnesses while refusing to immunize a comparable defense witness in order to keep favorable evidence from the fact finder. The remedy is calibrated to the violation. The judge can compel the immunity grant or, if that is not done, abate the proceedings on the affected charges, which pressures the Government either to immunize the witness or to forgo those charges.
The prohibition on de facto denial
A related standard protects the integrity of the process itself. Trial counsel or a staff judge advocate would violate Rule for Courts-Martial 704 by de facto denying a request for immunity, meaning withholding the request from the convening authority rather than forwarding it for a decision. The rule contemplates that all immunity requests, from either side, reach the convening authority for a genuine determination. A defense request cannot be quietly buried by the prosecution. If that happens, the defense has grounds to seek relief from the military judge, because the convening authority never actually exercised the discretion the rule assigns to that office.
Why these standards are structured this way
The framework balances two concerns. On one side is the convening authority’s legitimate interest in controlling prosecutions and not lightly shielding potential offenders. On the other is the accused’s constitutional right to a fair trial, including the ability to present a defense. By vesting the grant in the convening authority but allowing judicial intervention upon findings of witness invocation plus governmental abuse, the rule lets the Government manage immunity in the ordinary case while preventing prosecutors from using their control over immunity to tilt the playing field.
Practical implications for the defense
A defense team seeking immunity for a witness should document why the witness will invoke the privilege, what the expected testimony is and why it is material and favorable, and, critically, any evidence that the Government has immunized its own witnesses on comparable matters while declining to immunize the defense witness. The request should be made to the convening authority, and if it is denied or never forwarded, the defense should be prepared to move the military judge, framing the motion around the two required findings and the de facto denial prohibition. Because immunity decisions can determine whether a key account ever reaches the fact finder, this is an area where careful, well-supported advocacy is decisive, and where experienced military defense counsel adds significant value.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how the Uniform Code of Military Justice (UCMJ), the Rules for Courts-Martial, the Military Rules of Evidence, and related military administrative processes work as a matter of public legal education. It does not constitute legal advice, a legal opinion, or a recommendation about any particular case, and it is not a substitute for advice from a qualified military defense attorney who can evaluate the specific facts and command, service, and jurisdictional circumstances involved.
Reading this article, or contacting any website on which it appears, does not create an attorney-client relationship between the reader and any law firm, attorney, or author. Every court-martial, nonjudicial punishment action, administrative separation, and security-clearance matter turns on its own facts, the charged articles, the convening authority, the service branch, and the evidence, and outcomes vary widely from one case to another.
Military law also changes over time. The Military Justice Act of 2016 (effective January 1, 2019) and subsequent National Defense Authorization Acts renumbered and rewrote many punitive articles, revised the Article 32 preliminary hearing, and altered sentencing, clemency, and appellate procedures. Statutes, regulations, executive orders, the Manual for Courts-Martial, and decisions of the service Courts of Criminal Appeals and the Court of Appeals for the Armed Forces may have been amended, superseded, or reinterpreted after this article was written, and article numbers or procedures cited here may have changed.
For these reasons, no reader should act or decline to act based on this content without first consulting a licensed attorney experienced in military justice about their own situation. The author and publisher make no warranty, express or implied, as to the accuracy, completeness, timeliness, or current applicability of the information provided, and disclaim any liability for any action taken or not taken in reliance on it. If you are facing investigation, charges, or an adverse administrative action, time limits may apply, and you should seek qualified counsel promptly.