The Justice Department has charged 10 former National Football League players of defrauding a health insurance program for retired players, Assistant Attorney General Brian Benczkowski announced at a news conference on Thursday. The players allegedly filed more than $3.9 million in false claims, of which the health plan paid out $3.4 million between June 2017 and December 2018. Four of the accused are former players for D.C.’s football team.

In two separate indictments that followed a Federal Bureau of Investigation probe, the Justice Department alleges that the former NFL players “brazenly defrauded the plan by seeking reimbursement for expensive medical equipment that they never purchased,” Benczkowski said. “Things like hyperbaric oxygen chambers, ultrasound machines used by doctor’s offices to conduct women’s health exams, and even electromagnetic therapy devices designed for use on horses.”

The charged, including former Washington players Clinton Portis, Carlos Rogers, Robert McCune, and John Eubanks, allegedly treated the health care plan “like their own personal ATM machine,” Benczkowski said, threatening the program’s tax exempt status.

“The ringleaders of the fraud recruited other eligible former players by offering to submit or assist in submitting fake claims to the plan,” Benczkowski said. “In exchange, the ringleaders demanded kickbacks ranging from a few thousand dollars to $10,000 or more for each fraudulent claim.”

In a press release, the Justice Department named all of the players included in the indictments, filed in the Eastern District of Kentucky, which also include: Tamarick Vanover, Ceandris Brown, James Butler, Frederick Bennett, Correll Buckhalter, and Etric Pruitt.

Additionally, the government plans to charge former receivers Joseph Horn and former D.C. player Donald “Reche” Caldwell with conspiracy to commit health care fraud, per the release.

Mark Dycio, an attorney for Portis, told the Washington Post that his client was innocent, saying he “had no knowledge that his participation in what he believed to be an NFL sanctioned medical reimbursement program was illegal. He is completely taken aback by this indictment and will move forward with the process of clearing his good name and those of his fellow NFL alumni.”

D.C.’s football team has declined to comment.