Forged lease agreement produced to demand money

Dear sir landlord has given apartment on rent for 11 months, but tenent paid only 2 months rent in the begining and later refused and said to deduct in advance payment.Now the lease period is compleated landlord requested tenent to vacate the house. tenent taken the time and prolonged since 3 months now tenent has created a document agreement of xerox copies mentioning on that he has paid 10 lakhs for lease and he has altered the rental agreement into lease agreement and demanded 10 lakhs to vacate the permises, but landlord denied and forced tenent to vacate the permises, With in one day tenent moved to court and produced the forged documents and brought iom order from civil court, now what is the proceedure to evict the tenent and how long it takes to prove its an forged documents, can landlord approach the police and file an complaint, landlord is having only original rental agreement and xerox copies have been given to tenent , now the tenent is telling he is on lease by wrongfully produceing forged legal documents to court