In early 2005, Navy Lieutenant Commander Matthew Diaz, then deputy director of the Guantánamo detention center’s legal office, anonymously mailed the Center for Constitutional Rights a Valentine’s Day card containing the names of approximately 550 detainees. The list included seven fields for each entry, while the U.S. government had not officially confirmed many of the names. Barbara Olshansky of the Center for Constitutional Rights, which had requested detainee information after the military failed to provide a complete list, alerted federal authorities rather than publishing the material.
The disclosure exposed the conflict between military secrecy and Diaz’s obligations as a licensed attorney concerned with detainees’ legal rights. On July 28, 2006, the government charged him with five offenses, including an Espionage Act-related allegation that he intended to harm national security or aid a foreign nation. A military jury convicted him of four counts in May 2007; he was sentenced on May 18 to six months in prison and dismissed from the Navy. His Kansas law license was ultimately revoked on November 21, 2012, although he was admitted to the New York bar on May 2, 2018. Diaz received the 2008 Ridenhour Prize for Truth Telling.