Hi
1) Sub leasing of premises without the consent of owner is illegal.
2) Please refer to judgment of Supreme Court of India dated 12 April 2017 in Anilkumar Dadurao Dhekle vs Rukhiben & Ors , CIVIL APPELLATE JURISDICTION, CIVIL APPEAL NO. 5284 OF 2006 wherein the Supreme court granted orders favouring the landlord on the grounds of sub-letting.
3) You have done the right thing by filing a suit and we presume the suit is either for eviction or payment of rents.
4) Hopefully you have requested for interim directions to the court, asking for deposit of rents in the court till such time the other side is in possession.
5) In general, once the suit is in court, police have no powers to interfere in civil suit.
6) You should file a written complaint with the higher officials like CP or DCP against the occupant and the so called encounter specialist.
7) Ideally you should have a case of trespass prior to the commencement of civil suit. It is a tad late for you to file a criminal trespass against the tenant.
7) But you can file a case against the original tenant and implead in the current tenant on charges of criminal breach of trust (Section 405 in The Indian Penal Code) and trespass also in the complaint even now.
8) Generally proceedings in Civil Court take about 12-18 months. However we can advise on the counsel performance depending on the current stage of your suit in the court.
Hope this helps