Property dispute - forgery and cheating

My father has some ancestral property -agricultural land and house property at his native village. The property is jointly owned by father with his step brothers and step sisters. There were lot of impediments created in the past to make it difficult for my father to make use of that land / get his share. Fed up of all this my father temporarily decided to focus away from these matters. Last year when we obtained the land records we got to know of the following : 1. Some land has been transferred to two step brothers by forging my father's signature on a fake release deed 2. Some land is sold without my father's mention and signature 3. All remaining land is transferred amongst the brothers by executing release deeds and not having any reference to my father's name So in essence my father's name is NOW REMOVED from all revenue records. With the help of a local lawyer we have filed a civil suit praying for partition and injunction against alienation. The hon'ble court has granted us the injunction. Now since the way civil cases are conducted the lawyer asked us to start criminal proceedings. Accordingly we did two things: 1. Filed a complaint with the juridisdiction police station [ initially unwilling to accept the complaint but after looking at the documents accepted the complaint] 2. Filed a private complaint with Judicial Magistrate and the magistrate has issued directions to the police to submit a report in one month. [ IPC 419,420,465,468,471- section 34] Now we received a call from the police station informing us that the other party has come and agreed to give us our share in the property[ mediated by local politician] and asking us to come and settle the matter. I have replied that the police should talk to our lawyer in this regard. Our objective is to use the criminal case as a tool to settle the matter by obtaining our legitimate share of property and damages. My father's step brothers and sisters have a history of cheating and have political backing. They have on multiple occasions have agreed onto something when they want some signature but, after their work is done then gone back on all the agreements and cause loss to my father. So there is no question of trusting them. I have had a discussion with our lawyer and he also seems to be under pressure from local politicians. In this situation how do we proceed further ? specifically I am not going to withdraw criminal complaint unless 1. All the revenue records are brought back the correct status - i.e. all fraudulent transactions are cancelled by giving an undertaking to that effect. These have to be done by the other party at their time and cost 2.The civil suit has to be settled via a court decree 3.The partition has to be effected and the land title should be transferred to my father's name [ the mandatory period should elapse] Please comment on these and also let me know if there are any more things to be taken care. Also A. How long can we prolong the criminal complaint so that we have the leverage and at the same time we have the option to get out without pressing for charges ? Please advise how should this be handled. B. How do we keep an option to take resort to criminal case in case we are again cheated in this whole agreement C. There are already hints that the local politician can try dangerous things. What steps can we take to ensure we are adequately protected and the other party has a sizable deterrent D. To pressurize us the police may try to waste our time by calling us to the station unnecessarily. [ we are 7 hours away by car/train to the jurisdiction police station]. So what are our rights and duties as complainant? D.1. Should we always go to the police station whenever requested / the police have to come to our place after the initial statement ? D.2. My father is in his early seventies so can that be used to avoid these unnecessary visits ? E. How do we ensure that once the matter is settled the other party should not try to cancel this agreement ? Please advise.