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Counterintelligence: Leandro Aragoncillo

Counterintelligence can be described as activities designed to prevent or thwart spying, intelligence gathering, and sabotage by an enemy or other foreign entity. This guide provides books, articles, reports, websites, and videos on the subject.

Leandro Aragoncillo, FBI

Leandro Aragoncillo was arrested in September 2005 with the charge of passing classified intelligence information to the Philippines. He did this while working in the White House and also later while working as an analyst for the FBI.  Aragoncillo was sentenced in 2007 to ten years in prison.