FRONTLINE

The Human Polygraph Machine

Clip: Season 2011 Episode 14 | 1m 3s

Key to a successful interrogation -- being able to think quickly on your feet. How FBI interrogator Ali Soufan improvised a creative way to determine when one subject was lying.

Aired: 09/13/11

Rating: NR

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Un(re)solved

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Un(re)solved

"Un(re)solved" is a multiplatform experience telling the stories of lives cut short and examining a federal effort to investigate more than 150 cold cases that date back to the civil rights era.

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