Former American college student Glenn Duffie Shriver studied abroad in Shanghai, People's Republic of China.
There, he became a target of Chinese intelligence services and crossed the line when he agreed to participate in espionage-type activity.
He pleaded guilty to conspiring to commit espionage for a foreign government and was sentenced to a four-year term in federal prison.This video
contains excerpts from a prison cell interview where Shriver tells his own story, and warns U.S. students about the foreign intelligence threat.
The FBI also developed this film
to warn about the dangers facing U.S. students.