Time needed to evict son, DIL, and their two kids from my self acquired property

I live on ground floor of my house while my elder son, DIL, their two kids and my wife lives on the first floor. Recently my elder son came back with his wife and started living in a small room upstairs but in a matter of days, my elder son beat my younger son and put false allegations on him and me of beating their kids, disturbing the mental peace of his wife and also that we were trying to watch my DIL while she was changing clothes. My elder son has earlier tried to beat my wife, who ran inside her room to save herself and had also grabbed my collar and threatened me on two occasions. We had filed a complaint with the local police station but took it back fearing for the honour of my family. But this time he has crossed a line and has raises hands on my younger son who just completed his MBA and was on vacation here before joining his next job. I fear that the false complaint may harm his background verification and that's why We tried to settle for a sum of 5 lac Rs in exchange of him and his family vacating the house. But now he has refused to move out in hope of grabbing my self acquired property. Me, my wife, my younger son and his wife are suffering mentally due to this. I want to file a case in senior citizen tribunal for his eviction but fear that he may again file false cases and ruin my younger sons career. What should I do?