Yes, a military judge has the authority to dismiss charges sua sponte (on their own initiative, without a request from either party) for a lack of evidence, though this is typically done through a procedure known as a “finding of not guilty” after the prosecution rests its case. This authority is a crucial part of the judge’s role as the impartial arbiter of the law and a gatekeeper who ensures that a case without sufficient evidence does not go to the panel members (the jury).
The procedure is governed by Rule for Courts-Martial (RCM) 917. After the prosecution has presented all of its evidence and has “rested” its case-in-chief, the defense will almost always make a formal “motion for a finding of not guilty.” The defense argues that, even when viewing the government’s evidence in the light most favorable to them, they have failed to produce legally sufficient evidence to support a conviction. Even if the defense does not make this motion, the judge has an independent duty to consider the issue.
The legal standard for the judge is whether there is any evidence from which a reasonable panel member could find the accused guilty beyond a reasonable doubt. If the judge determines that the prosecution has completely failed to present evidence on a key element of the offense, they must grant the motion. The judge will enter a finding of not guilty, which has the same effect as an acquittal by a panel. This is a complete bar to any further prosecution for that offense.