Bigamy & Adultery by my father. What legal action can we take ?

-My father is insulting my mother,abusing & threatening that he would bring other woman in the house & beat her. I m working now,nt sure what legal claim i hv,although he stopped giving money to family when I was in college thus hindering education almost -My mother saved enough to buy some land-now he claims it is his and he is going to give it away. Saying she never had a right on his money - He has been bad mouthing her & her family evrywhere,so that he has some foundation built for his adulterous act -We went to IG office filing complaint,but as he was DSP then,he got it in his favor