The New York Times 
Robert P. Hanssen – FBI Agent and Spy [EPUB ebook] 

This e-single comprised of articles from The New York Times archive is about Robert P. Hanssen, an F.B.I. agent who spied for the Soviet Union and then Russia over a 20 year period. He was ultimately arrested in February 2001 after dropping off secret documents at a park near his home in Northern Virginia. Hanssen was found to have passed classified information, including the identities of K.G.B. officers spying for the United States.