Paul J. Freeman, 68, of Niceville, Florida, was charged with nine counts of illegally retaining and leaking information on Air Force aircraft and weapons.
About 1,300 gallons of toxic fire suppressant leaked at the Red Hill Bulk Fuel Storage site near Joint Base Pearl Harbor-Hickam, Hawaii, on Nov. 29, 2022.
Federal prosecutors are urging a judge to keep the accused leaker behind bars, arguing he may still have access to secret documents that he could expose.
The Air Force says it has opened its own investigation into how a lone airman could access and distribute possibly hundreds of highly classified documents.