Manav, whom Sanatan had accused of having a hand in the killing of rationalist Narendra Dabholkar, rubbished the allegations, saying, "What would I have gained by killing him."
Manav also said Dr Jayant Athavale of Sanatan had carried out an experiment in hypnotism on him in 1989.
Sanatan Sanstha had come under scanner when its member Sameer Gaikwad was arrested from Sangli in Maharashtra in connection with the murder of rationalist and CPI leader Govind Pansare.
"These people (sadhaks of Sanatan) are trained in such a manner that they won't share any information with you. Sanatan hypnotises young people and makes them tread the evil path," he said.
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"I am confident that Chief Minister Devendra Fadnavis will take appropriate action (against Sanatan) as facts become clear," Manav said.
Slain IPS officer Hemant Karkare had done a lot to unearth misdeeds of Sanatan and similar organisations, Manav said.