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The U.S. Department of Justice has charged a National Security Agency contractor with theft of government property and unauthorized removal of “highly classified” information, authorities announced today.

51-year-old Harold Thomas Martin of Glen Burnie, Md. was arrested after search warrants were executed at his house on August 27, where investigators found a number of classified documents, including six classified documents with “sensitive sources, methods, and capabilities,” according to a press release from the Department of Justice, which added that the documents’ “unauthorized disclosure reasonably could be expected to cause exceptionally grave damage to the national security of the U.S.” (The “Top Secret” classification level is applied to information that could cause “exceptionally grave damage” if leaked.)

Martin was an employee at Booz Allen Hamilton, the same government contractor that employed Edward Snowden, who passed along extensive details about NSA surveillance methods to the media in 2013.

Unlike Snowden, however, Martin is “suspected of taking the highly classified ‘source code’ developed by the agency to break into computer systems of adversaries like Russia, China, Iran and North Korea,” reports The New York Times.

Snowden said on Twitter today that calling him and Martin the same over their shared employer is “lazy,” though Booz Allen’s unique position with the NSA is worth investigating.

Earlier in August, NSA-linked hacking tools with names like Egregiousblunder were released as part of an apparent online auction. “Without a doubt, they’re the keys to the kingdom,” one former NSA hacker told The Washington Post about the posted hacking tools. “The stuff you’re talking about would undermine the security of a lot of major government and corporate networks both here and abroad.”

Martin appeared in court August 29, and is still detained, according to the DOJ. He faces 11 years in prison if convicted—a maximum of one year for unauthorized removal and retention of classified materials, and a decade for theft of government property. The charges were unsealed today.