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20 November 2013 - BBC NEWS

South Yorkshire Police to spend £35k on Texas lie detector training Polygraphs, or lie detectors, monitor heart rate, brain activity, sweating and blood pressure. 
A police force is to spend £35,000 to send two officers to Texas to learn how to use lie detectors on sex offenders.
South Yorkshire police commissioner Shaun Wright said it would "protect children at risk of sexual abuse".