A former Booz Allen Hamilton contractor who worked with the National Security Agency will face charges of espionage in a case involving 50 terabytes or more of highly sensitive NSA data the government says were stolen.

Federal attorneys Thursday said they will prosecute Harold Thomas Martin of stealing classified information under the same law used to indict Edward Snowden. Those convicted under Espionage Act charges face particularly harsh penalties which can include prison time of up to 10 years on each count.

Was Harold Thomas Martin a data hoarder whose poor security practices led to criminal theft of the NSA cyberweapons in the "Shadow Brokers" hack? Was Martin knowingly involved in that criminal effort? No clear answers now, but these questions may well be the focus of any forthcoming trial.

From Reuters:

Harold Thomas Martin spent over two decades pilfering classified information from multiple government agencies, federal prosecutors said in a new filing made in a U.S. District Court in Baltimore. They expected to bring charges that included violations of the Espionage Act, the filing said. The amount of stolen data is estimated to be at least fifty terabytes, enough to fill dozens of hard drives, prosecutors said, adding that the alleged criminal conduct "is breathtaking in its longevity and scale." Some officials have said the trove may amount to the largest heist of classified government information in history. An attorney representing Martin was not immediately available for comment. Among the material allegedly stolen by Martin included a top secret document that contained "specific operational plans against a known enemy of the United States and its allies," the prosecutors said. U.S. officials announced in a criminal complaint earlier this month that Martin, 51, was taken into custody in Maryland in August and charged with felony theft of classified government material. It did not allege a motive.

And from an earlier Daily Beast profile of Martin: