False abetment charges

Hello. Here is my story in short: We are 2 brothers and my uncle had no son. My dad had given my brother to my uncle in 2003 without any adoption process ot paper work. My brother started handing uncle's fruit business. All went fine but my uncle started using my bro against us. He did his marriage in Oct 2014 without my family's presence (have photography). But after some time some unknown issue happened in his family and my sister in law could not continue in his family and went back to her parents. Then my brother felt bad and asked my uncle to get his wife back. But he rejected. My brother came to my father and asked the same. We talked to girl's family. And she was ready to come back to our own home (Not uncle's home where she stayed for some time). Then my brother decided to quit working at fruit shop and come back to home. My father accepted both of them (brother and his wife). Things started working smoothly. We got all the hisab kitab of last 13 years in the presence of some big guns of the village and had written agreement on 14 Oct 2016, that everything is cleared now and nothing left to give or take in the two families(our and my uncle's). Both families signed the agreement and we started living happily. Then we did not have any point of contact with them orally/call or in any way. Then we don't know what happens in their house and My uncle committed suicide on 21 Nov 2016 (after 37 days we left talking/meeting/all kind of relations) and in suicide note, he mentioned our families name (me, my parents, brother and bhabi) that we are forcing him for his property. which is totally wrong. My aunt's brothers are helping my aunt to file false case against us and an FIR IPC306 AND 34 have been launched. We are really not sure what to do in that case. We all are innocent. We are not yet got arrested as police is supporting a lot as they know this is totally false case. Please guide what should I do next.