Army intelligence analyst Chelsea Manning was arrested in May 2010 after hacker Adrian Lamo alerted authorities that Manning had acknowledged providing classified material to WikiLeaks. Investigators said they recovered approximately 251,287 diplomatic cables, more than 400,000 Iraq War reports, about 90,000 Afghanistan War reports, and videos including the 2007 Baghdad airstrike footage later called “Collateral Murder.” Digital-forensics witnesses testified that Manning downloaded material from secure networks, stored files on an SD card and personal devices, and communicated with WikiLeaks-linked accounts.
Manning pleaded guilty to 10 of 22 charges on February 28, 2013, and was convicted at court-martial on July 30 of espionage-related offenses, theft, computer fraud, and military infractions. The judge acquitted Manning of aiding the enemy, the charge carrying potential life imprisonment or death. On August 21, 2013, Manning received 35 years in prison, a dishonorable discharge, loss of pay, and reduction to E-1. President Barack Obama commuted the sentence to seven years on January 17, 2017; Manning was released May 17. The Army Court of Criminal Appeals upheld the Espionage Act conviction on May 31, 2018, leaving the case as a major precedent in the prosecution of technology-enabled disclosures of government secrets.