As the story of the SVR illegals played out this past week, I trolled Google News searching for insight from former SVR officer Sergei Tretyakov to no avail. Sergei Tretyakov may be the most important spy for the United States since the end of the Cold War; it is believed that he spent 3 years as a US agent while he was still an SVR colonel in New York before he defected.

So it is with great regret to learn that Sergei Tretyakov, at the age of 53, died June 13 of a heart attack at his home in Florida. Rest in peace, Comrade J.
Sergei Tretyakov, Spy Who Fled to U.S., Dies at 53, The New York Times, July 9, 2010.
Sergei Tretyakov dies; former Russian spy defected to U.S. in 2000, The Washington Post, July 10, 2010.
Sergei Tretyakov, Russian Spy ‘Comrade J,’ Dead at 53, PeteEarley.com, July 9, 2010.
Sergei’s Death. Mistakes. Nonsense and a Chuckle, PeteEarley.com, July 10, 2010.
The story of Sergei Tretyakov is told in Comrade J.: The Untold Secrets of Russia's Master Spy in America after the End of the Cold War by veteran intelligence journalist Pete Early. Tretyakov also gave an extensive interview over a series of reports by WTOP titled "Escaping from the Iron Curtain".