Dear Querist
Immediately issue a legal notice for eviction and termination of tenancy under section 106 of Transfer of property Act, after notice period, you may file a civil case against him before the civil court of area where the property is situated.
For the threatening you may file a criminal complaint against him before police station of your area where your family is residing or tenant is residing. He may be prosecuted for the offence of criminal intemidation and breach of trust too under section 406/506 of Indian Penal code-1860.
Feel free to call