A federal contractor was arrested in August for unlawful retention of classified documents [washingtonpost.com]:
A federal contractor suspected of leaking powerful National Security Agency hacking tools has been arrested and charged with stealing classified information from the U.S. government, according to court records and a law enforcement official familiar with the case. Harold Thomas Martin III, 51, who worked for Booz Allen Hamilton, was charged with theft of government property and unauthorized removal and retention of classified materials, authorities said. He was arrested in August after investigators searched his home in Glen Burnie, Md., and found documents and digital information stored on various devices that contained highly classified information, authorities said. The breadth of the damage Martin is alleged to have caused was not immediately clear, though officials alleged some of the documents he took home "could be expected to cause exceptionally grave damage to the national security of the United States." Investigators are probing whether Martin was responsible for an apparent leak that led to a cache of NSA hacking tools appearing online [washingtonpost.com] in August, according to an official familiar with the case.
From the US DoJ [justice.gov] release:
A criminal complaint has been filed charging Harold Thomas Martin III, age 51, of Glen Burnie, Maryland, with theft of government property and unauthorized removal and retention of classified materials by a government employee or contractor. According to the affidavit filed in support of the criminal complaint, Martin was a contractor with the federal government and had a top secret national security clearance. Martin was arrested late on August 27, 2016. The complaint was filed on August 29, 2016, and unsealed today.