The Supreme Court of Guam has unanimously cleared former Department of Public Health and Social Services director Arthur San Agustin and current chief environmental health officer Masatomo “Tom” Nadeau, ending a government corruption case filed in 2023 by Attorney General Douglas Moylan. 

The high court upheld a superior court dismissal with prejudice, meaning the charges cannot be refiled.

Attorney Jay Arriola, who represented San Agustin, said the ruling “fully and finally exonerated” both men and brought the case to an end. Arriola criticized the prosecution as “frivolous criminal charges brought by an abusive and power-hungry attorney general,” adding that no public servant should have to endure years of litigation over what he called a “gross abuse of power.”

Arriola said San Agustin’s reputation was severely damaged by the case, describing years of legal battles, emotional distress, and financial burden. He also said san agustin is considering a lawsuit for malicious prosecution and additional ethics complaints against Moylan.

The Attorney General’s Office maintains the prosecution led to expanded health inspections across public schools and credited the case with improving school conditions, despite the Supreme Court’s dismissal.

The justices noted prosecutors failed to directly address why the permanent dismissal should be reversed, ruling the appeal itself must be dismissed—bringing the case to a definitive close.