Aaftab Poonawala Confessed To Shraddha Walkar's Murder In Polygraph, No Remorse: Sources

Any "confession" in a polygraph test, or in narco-analysis, cannot be primary evidence, though it may be used to track other proofs

Aaftab Poonawala has allegedly admitted to having killed his girlfriend, Shraddha Walkar, in his polygraph test. Sources in the probe team said he expressed no remorse for it. Such a confession in a polygraph test, or in the narco-analysis test that follows, is not routinely admissible as evidence, but any material proofs that it may lead to can be used in court.

His narco-analysis test — next step in what's generally known as a lie-detection procedure — is on December 1. A local court on Tuesday allowed Delhi Police to conduct the narco test, giving it permission to take him to a lab in Delhi's Rohini on December 1 and 5.

That test involves intravenous administration of a drug or 'truth serum' — such as sodium pentothal, scopolamine, and sodium amytal — that causes the person to enter various stages of anaesthesia. In that hypnotic state, the person becomes less inhibited and is more likely to divulge information.

Investigating agencies use it when other evidence does not build a clear-cut case. For instance, in this case, the murder was committed in May and the body parts found earlier this month are yet to be confirmed as hers; DNA test reports are awaited.