Also charged in the killings is Salmon's wife, Heather Salmon. Her attorney, Charles Nester, did not immediately return a call seeking comment.
Pauley said Aguigui funded the militia using $500,000 in insurance and benefit payments from the death of his pregnant wife a year ago. Aguigui was not charged in his wife's death, but Pauley told the judge her death was "highly suspicious."
She said Aguigui used the money to buy $87,000 worth of semiautomatic assault rifles, other guns and bomb components that were recovered from the accused soldiers' homes and from a storage locker. He also used the insurance payments to buy land for his militia group in Washington state, Pauley said.
In a videotaped interview with military investigators, Pauley said, Aguigui called himself "the nicest cold-blooded murderer you will ever meet." He used the Army to recruit militia members, who wore distinctive tattoos that resemble an anarchy symbol, she said. Prosecutors say they have no idea how many members belong to the group.
"All members of the group were on active-duty or were former members of the military," Pauley said. "He targeted soldiers who were in trouble or disillusioned."
The prosecutor said the militia group had big plans. It plotted to take over Fort Stewart by seizing its ammunition control point and talked of bombing the Forsyth Park fountain in nearby Savannah, she said. In Washington state, she added, the group plotted to bomb a dam and poison the state's apple crop. Ultimately, prosecutors said, the militia's goal was to overthrow the government and assassinate the president.
Fort Stewart spokesman Kevin Larson said the Army has dropped its own charges against the four soldiers in the slayings of Roark and York. The Military authorities filed their charges in March but never acted on them. Fort Stewart officials Monday refused to identify the units the accused soldiers served in and their jobs within those units.
"Fort Stewart-Hunter Army Airfield does not have a gang or militia problem," Larson said in a prepared statement, though he said Army investigators still have an open investigation in the case.
"However, we don't believe there are any unknown subjects," he said.
District Attorney Tom Durden said his office has been sharing information with federal authorities, but no charges have been filed in federal court. Jim Durham, an assistant U.S. attorney for the Southern District of Georgia, would not comment on whether a case is pending.