A federal judge ordered the airman accused of leaking hundreds of classified documents to remain in jail while he awaits trial on Friday.

Prosecutors argued that Massachusetts Air National Guardsman Jack Teixeira, 21, posed too great a threat to U.S. national security to remain free, even if remanded into the custody of his father, which his defense attorneys sought.

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U.S. Magistrate David Hennessy's ruling comes after prosecutors revealed that Teixeira had a history of violent rhetoric and had been reprimanded twice before his arrest for taking notes on classified documents or viewing intelligence not related to his work.

“Who did he put at risk? I mean, you could make a list as long as a phone book,” Hennessy said, referencing military personnel, medical workers overseas, and Ukrainian citizens, according to the Associated Press.

He was arrested on April 13 and has been behind bars since then, facing charges under the Espionage Act for the alleged unauthorized retention and transmission of classified national defense information. He has not yet entered a plea.

"The weight of the evidence against the Defendant has only grown stronger, and the risks the Defendant poses if released have only come into sharper focus," prosecutors argued in court documents ahead of the hearing. "Because no condition or combination of conditions would satisfy the concrete and serious concerns raised by the government, the Defendant should remain detained."

In the filing, prosecutors detailed three different instances where Teixeira was caught by superiors violating policies regarding classified information. In one instance last September, he was seen taking notes on classified documents, and a month later, his superiors were informed that he may have been violating a cease-and-desist order on deep diving into intelligence information.

Despite both incidents, he was given the chance to explore cross-training opportunities but declined.

He was then also caught using a Joint Worldwide Intelligence Communications System machine, and the person who saw him found him viewing "content not related to his primary duty and was related to the intelligence field" in late January, which is after he began allegedly leaking documents.

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Teixeira's alleged leak included hundreds of documents detailing the reach of the U.S. intelligence community and revealed key information regarding allies and adversaries alike, including the war in Ukraine.

The Pentagon is reviewing its procedures surrounding the handling of classified credentials and information and has already made some changes, while the Air Force is conducting its own investigation. Two leaders of Teixeira's unit have been temporarily suspended amid the fallout of the leaks.