'Menacing' emails detailed military brass' travels[ Tue, 13 Nov 2012 01:39:17 GMT ]“Menacing” anonymous emails that launched the FBI investigation which ultimately brought down CIA Director David Petraeus contained references to the “comings and goings” of high-level U.S. military officials, raising concerns that someone had improperly gained access to sensitive and classified information, a source close to the recipient tells NBC News.