The preliminary hearing officer, or PHO, presides over the Article 32 preliminary hearing in the military justice system. That hearing comes before a general court-martial and serves as a screening step. Many people assume the PHO functions like an investigator who digs into a case and develops evidence. That assumption is outdated. Congress deliberately narrowed the role, and the Rules for Courts-Martial reinforce sharp limits on what the PHO may do. This article explains the boundaries of the PHO’s authority and why they exist.
From investigation to preliminary hearing
For decades, the Article 32 proceeding was called an investigation, and the investigating officer had broad latitude to develop evidence and explore the case. Congress rewrote Article 32, renaming it a preliminary hearing and stripping the hearing officer of the old investigative role. The reforms took effect on December 26, 2014, following implementation in the Manual for Courts-Martial. The change was not cosmetic. It reoriented the proceeding from a fact-finding expedition into a focused, limited probable-cause screen, closer in function to a federal preliminary hearing than to a grand jury inquest.
Understanding that history is the key to the limits. The PHO is not there to investigate. The PHO is there to make defined determinations on a defined record.
The PHO’s narrow purpose
Article 32 confines the hearing to a small set of questions. The PHO must determine whether each specification alleges an offense under the UCMJ, whether there is probable cause to believe the accused committed the charged offense, whether the convening authority has court-martial jurisdiction over the accused and the offense, and what disposition of the case the PHO recommends. Those determinations define the PHO’s lane. Anything outside them is outside the PHO’s role.
The probable-cause standard is the heart of the proceeding. The PHO is not deciding guilt and is not weighing evidence as a trier of fact would at trial. The PHO is screening whether there is enough to justify referral to a general court-martial.
The first limit: scope is restricted to the charged offenses
The PHO’s inquiry is limited to the offenses that have been charged. The hearing is not an open-ended exploration of the accused’s conduct, and the PHO is not authorized to hunt for new offenses or to expand the matter beyond what the charges allege. If the evidence suggests an uncharged offense, the PHO may note it consistent with the rules, but the PHO does not transform the hearing into an investigation of that new matter. The focus stays on whether the charged specifications state offenses and are supported by probable cause.
The second limit: it is not a discovery vehicle
Perhaps the most significant practical limit is that the modern Article 32 hearing is no longer a discovery tool for the defense. Under the prior investigation model, the defense often used the proceeding to learn the government’s case and to obtain witness testimony. The reforms ended that. The PHO does not exist to provide discovery, and the hearing is not a mechanism for the defense to compel the production of evidence it could not otherwise obtain. Discovery is governed by separate rules; the preliminary hearing is a probable-cause screen, not a deposition or a disclosure engine.
The third limit: constrained power to compel witnesses and evidence
The PHO’s authority to call witnesses and gather evidence is limited rather than open-ended. The rules emphasize the use of available evidence, including reliable hearsay, sworn statements, and documents, and they restrict the circumstances under which live witnesses must be produced. A victim of an alleged offense may decline to testify at the preliminary hearing, and the PHO cannot compel a victim’s testimony in that setting. Witness production turns on relevance and necessity to the limited purpose of the hearing, not on a broad desire to develop the record. This reflects the deliberate decision to keep the proceeding lean and to avoid recreating the old investigative model.
The fourth limit: the PHO is an impartial screener, not an advocate or factfinder at trial
The PHO must remain impartial. The PHO is generally a judge advocate when the case heads toward a general court-martial, and the role demands neutrality between the parties. The PHO does not act as a prosecutor building the government’s case, and does not resolve the ultimate question of guilt. The PHO makes recommendations and probable-cause determinations; the convening authority decides disposition, and a court-martial decides guilt. Keeping these functions separate protects the integrity of the process.
The fifth limit: recommendations are advisory
The PHO produces a report with findings and a recommendation about disposition, but that recommendation does not bind the convening authority. The convening authority makes the referral decision. The PHO’s role ends with a recommendation grounded in the limited determinations the rules authorize. This advisory character underscores that the PHO is a screening official, not a decision-maker on the fate of the case.
Why these limits matter
The limits serve several purposes. They protect victims from being compelled to testify at an early stage. They prevent the hearing from ballooning into a costly mini-trial. They keep the proceeding focused on its genuine function, which is to ensure that charges are legally sufficient and supported by probable cause before the significant step of a general court-martial. For the defense, the limits mean the Article 32 hearing is no longer the discovery opportunity it once was, which changes defense strategy. For the government, the streamlined hearing reduces the burden of the screening step while preserving its essential safeguard.
Bottom line
The PHO operates within tight boundaries. The role is to screen charged offenses for legal sufficiency and probable cause, to assess jurisdiction, and to recommend a disposition. The PHO may not conduct a roving investigation, may not serve as a discovery vehicle for the defense, has only limited power to compel witnesses, cannot compel a victim to testify, must stay impartial, and issues only an advisory recommendation. These limits flow directly from the 2014 reforms that converted the old Article 32 investigation into a focused preliminary hearing.
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.