The Navy-Marine Corps Court of Criminal Appeals has upheld the conviction of Mason W. Williams, a Hospital Corpsman Third Class in the U.S. Navy, for willful dereliction of duty and disorderly conduct. The court's decision, issued on July 13, 2026, affects Williams's military career and sets a precedent for similar cases involving military conduct and discipline.
Williams was convicted in June 2021 during a special court-martial held at the Marine Corps Air Ground Combat Center in Twentynine Palms, California. His conviction stemmed from a failure to obey and enforce weapons safety rules, which is critical in a military environment where safety is paramount. The ruling highlights the importance of maintaining discipline within the ranks of the armed forces.
Background
The case involved Mason W. Williams, who faced charges for his actions on August 16, 2019. The charges included willful dereliction of duty under Article 92 and disorderly conduct under Article 134 of the Uniform Code of Military Justice (UCMJ). Williams pleaded not guilty to the charges but was ultimately found guilty of willful dereliction of duty.
During the trial, the government moved to conditionally dismiss the disorderly conduct charge, which the military judge granted based on an unreasonable multiplication of charges. This means that the judge found the prosecution had brought too many charges for the same act, which can lead to unfairness in a trial. The case was then appealed to the Navy-Marine Corps Court of Criminal Appeals, where Williams raised several issues regarding the trial process.
The Ruling
The court ruled on three key assignments of error raised by Williams. First, it found that the Rule for Courts-Martial 912(f)(4) did not improperly deprive him of his right to a peremptory challenge, which allows a party to reject a potential juror without stating a reason. Second, the court determined that the military judge did not err in denying a challenge for implied bias against a panel member who expressed a desire for an explanation from Williams.
The court stated, "We find no prejudicial error and affirm." This indicates that the judges found no significant mistakes that would have affected the outcome of the trial.
However, the court did agree with Williams on the third assignment of error, stating that the Entry of Judgment (EOJ) did not comply with the relevant rules because it failed to accurately reflect the conditional dismissal of the disorderly conduct charge. The court noted that the EOJ incorrectly identified the nature of the dereliction of duty charge and omitted specific details about the order allegedly violated. Despite these errors, the court concluded that they did not result in any prejudice to Williams's rights.
Impact
This ruling is significant as it reaffirms the military's authority to maintain discipline and enforce safety regulations. The decision could influence future cases involving similar charges, as it clarifies the standards for evaluating the conduct of military personnel. The court's affirmation of Williams's conviction serves as a reminder of the consequences of failing to adhere to military regulations.
Moreover, the ruling highlights the importance of accurate record-keeping in military trials. The court's modification of the Entry of Judgment emphasizes that all court-martial records must correctly reflect the proceedings to ensure transparency and fairness in the judicial process.
What's Next
Details were not available in the court filing regarding whether Williams plans to appeal the ruling further. However, given the nature of military law, it is possible that he could seek further review within the military justice system. There are no related cases pending that were mentioned in the opinion.











