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"The hackers targeted Mr. Mullen's personal computers, which he used while working on the grounds of the U.S. Naval Academy since his retirement in 2011, according to officials and others familiar with the probe," The Wall Street Journal reports. "Those people said FBI agents took away two computers in late October and returned them in mid-November. One official said that evidence gathered by the FBI points to China as the origin of the hacking, and that it appeared the perpetrators were able to access a personal email account of Mr. Mullen."
"Mullen's office confirmed that the retired admiral was cooperating with a cyber investigation," Reuters reports. "'Admiral Mullen, now a private citizen, has responded to very specific requests and is cooperating with an ongoing cyber investigation he has been informed is focused overseas,' it said in a statement."
"Mullen was one of five people named to a State Department board last month to review the events surrounding the attack on the U.S. consulate in Benghazi, Libya in September," writes Mobile & Apps' Khurram Aziz. "Mullen also serves on advisory boards at the State Department and Central Intelligence Agency and has access to classified information."