DOD employee pleads guilty to espionage

WASHINGTON (CNN) - A weapons policy expert at the U.S. Defense Department pleaded guilty on Monday to an espionage charge involving disclosing national defense information to China, federal officials said.

William Bergersen, 51, of Alexandria, Virginia, was arrested in February and charged with conspiracy to illegally disclose national defense information to unauthorized individuals.

Bergersen was a weapons systems policy analyst at the Defense Security Cooperation Agency, a DOD agency located in Arlington, Virginia.