Sec 182

Hi me, my 2 sisters, my father and my brother have been falsely accused of Ammendment of suicide of my sister in law. My father & brother were in custody for 2 months and we somehow managed for their bail and yesterday we sisters got unconditional bail too. My brother’s daughter had filed an FIR against all 5 stating that we troubled her mom for property & dowery which is incorrect. She has also given statement in front of magistrate. Now we have collected very strong evidence against my sister in law’s reason of suicide. She had extra martial affair with a gay and he kind of forced her to commit suicide. We have all the audio and their private moment photos which we can’t Come out publicly. We found all these on her 2 phones. We are surprised that the investigating officer didn’t check the Other side of the story and just on that girls influence she filed FIR against all. He had these phones with him for a month or so. And niece had for another one month till my father & brother came out on bail. Now we want to fill an application against certain people which are responsible for this. We also think my niece knew this from beginning. Our lawyer is just taking a back seat and telling us to keep quit. He’ll take through court and will ask for crime branch investigation. This’ll take ages. Can we put an application against my niece and her other side of family. What’s the procedure. What’s IPC sec 182? Please suggest.