How i get my money from a froud person

He is working as builder, He taking me & my family in confidence that we should start a new business of import & Export as he is already running this business since a long time after that he taking my money approx 20 lac from me & 3 lac from my father, once a day he is get a drunk and told to me that he is supply a red sandalwood, I denied to do this work and told him to return my money back & also informed his parents regarding this, His father said that yes i know he is working illegal work & also involved in this work since 2013 & also a FIR has been registered against him in forest act and case is running also. I told his father return my money back i don't want to work like this with him as i m a honest and a gentle person of the society. One day he took me one of his friends to ask for a refund he provide me lunch over there after having lunch i felt unconscious when i came in conscious i found me on bed with a lady knowing by him after that he & his friend came to the room & shown me some pics with that lady & demanded to me more money for settlement they blackmailed me if i don't give them money he uploaded the pics on internet, I tell all the incident to my family my father go to police station but they never respond on our application after that i traced all of them on whatsapp, His wife already shared a note on facebook that he running a trap with his team & blackmail some innocent people. i have some screenshots of whatspp in which he accepted that he taking money from me by cash & I also have some audio recording for the same. Please suggest me how can i get my money back from this cheater.