Investigators are finding Pragnya Singh Thakur alias Sadhvi Purnachetanand Giri, arrested by Maharashtra Police for her alleged involvement in the Malegaon blast case, a tough nut to crack. And they are blaming her expertise in meditation.
Powered by her meditation training, the 36-year-old priestess knows how to control her mind and body mechanisms, said sources. It was only after this training that Swami Avadheshanand Giri anointed Pragnya as Sadhvi at the Allahabad Kumbh Mela last year.
This has got the investigating agencies worried after subjecting her to polygraphic tests.
A polygraph or a lie detector measures and records several physiological responses like blood pressure, pulse, respiration and skin conductivity when a person is subjected to a series of questions.
It measures physiological changes caused by the sympathetic nervous system during questioning. These are different when people lie.
But Pragnya, sources said, has been practicing the meditation methods since years and can control her responses making it really tough to believe if the answers even under the polygraph can be believed.
In fact, sources added, investigating agencies could hardly get a breakthrough from the polygraph tests. This was one of the reasons why the investigators planned to subject Pragnya to narco-analysis at the Kalina Forensic Laboratory.
But there was no official confirmation that the narco-analysis was conducted successfully.
Anti Terrorist Squad officers including joint commissioner of police Hemant Karkare and additional commissioner of police Sukhwinder Singh did not take mobile phone calls.