When investigators fail to advise a service member of the rights guaranteed by Article 31 of the Uniform Code of Military Justice, the defense will want to use that failure for maximum advantage. A frequent hope is that an Article 31 violation can knock out the entire case through a motion to dismiss all charges. The reality is more measured. An Article 31 violation is a powerful tool, but its primary remedy is suppression of evidence, not automatic dismissal. Dismissal can sometimes follow, but only as a downstream consequence when suppression leaves the government without enough evidence to proceed.
The standard remedy is suppression, not dismissal
Article 31(b) requires that a suspect be advised of the nature of the accusation, the right to remain silent, and the fact that any statement may be used at a court-martial before official questioning. When that advisement is not given and was required, the resulting statement is treated as involuntary under the Military Rules of Evidence and is generally inadmissible against the accused.
The mechanism for enforcing this is a motion to suppress, not a motion to dismiss. Under Military Rule of Evidence 305, a statement obtained in violation of Article 31(b) is analyzed for admissibility under Military Rule of Evidence 304, and a motion to suppress a statement must ordinarily be raised before plea. Once the defense files the motion, the government bears the burden of establishing the admissibility of the statement by a preponderance of the evidence. If the government cannot meet that burden, the remedy is exclusion of the statement from evidence. The charge itself is not extinguished by the violation; the tainted evidence is.
This distinction reflects the purpose of Article 31. The rule protects against compelled self-incrimination by excluding improperly obtained statements. It is an evidentiary protection. It does not declare that a charge is void simply because a statement was taken without a warning.
How suppression can lead to dismissal
Although dismissal is not the direct remedy, it can be the practical outcome. If the suppressed statement was the centerpiece of the prosecution, and the government has little or no admissible evidence left after the suppression ruling, the charges may collapse. In that situation the government may have to withdraw or dismiss charges because it can no longer carry its burden of proof at trial, or the military judge may dismiss for legal insufficiency once the evidence is …