Kolkata Doctor's Murder Case | Lie Detector Test on Sanjoy Roy: How it Can Help CBI's Prob

Lie Detector Test on Sanjoy Roy: How it Can Help CBI's Probe in Kolkata Doctor's Rape & Murder Case

The CBI has got approval to conduct a polygraph test on Sanjoy Roy, accused in the brutal rape and murder of a Kolkata doctor. How will this lie detector test help the investigation? Watch to find out.

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