Chelsea Manning, then a U.S. Army intelligence analyst, was arrested in May 2010 after hacker Adrian Lamo reported that Manning had acknowledged passing classified material to WikiLeaks. Investigators said Manning extracted roughly 400,000 Iraq War reports, 90,000 Afghanistan reports, 251,287 diplomatic cables and additional detainee files and videos from military systems, copying material to an SD card and personal devices. Digital-forensics witnesses described recovered WikiLeaks contact files, encrypted chats and file-transfer logs, highlighting failures in access controls, monitoring and information-assurance practices.
Manning pleaded guilty to 10 of 22 charges on February 28, 2013, but denied aiding the enemy. After a court-martial before Colonel Denise Lind, Manning was acquitted of that most serious charge on July 30, 2013, while being convicted of espionage-related offenses, theft, computer fraud and military infractions. The Army imposed a 35-year sentence on August 21, 2013; President Barack Obama commuted it to seven years on January 17, 2017, and Manning was released on May 17. The Army Court of Criminal Appeals upheld the Espionage Act conviction on May 31, 2018. The case remains a major precedent in the conflict between classified-data security, military accountability and public-interest disclosure.