Robert Hanssen, FBI agent who spied for Russia, found dead in prison
Hanssen, 79, was sentenced in 2002 to life in prison after pleading guilty to spying for the Soviet Union and later Russia for over 20 years.
Robert Hanssen, a former FBI agent deemed a traitor by the government Undated handout photo of former FBI agent Robert Hanssen(photo credit: REUTERS/FBI/Handout HK/SV/File Photo)