Paralysed immovable father cheated by son and neglected

Sir/madam, My father 78 years paral retired deputy collectors ,revenue department. My mom died 16 years back and I took my dad along with me to Singapore after one year of my brothers marriage since rifts started emerging between brother, his wife and dad. He was with us for 9 years. We came back to India for good & dad was with us 4 more years.. We never got a penny from him and he never did anything to us as daughter or son in law.. One day I happen to hear my dad talking to my bro( was working in US) that he would give my moms 120 sovereign's of gold, 50 lakhs cash and the property document of house (in my moms name which I HV a share too). I was terribly shocked hearing this. Then I asked my dad we never expected anything thinking that u wud be justifying person. If u have 2 sons and tho one takes care of u won't u give equal share... Then I started asking my dad to give my moms jewels which was in his custody. But he refused and moved to his house . by then my brother came on one year assignment here. When they were in US, His second wife started abusing me in facebook and false complaints to police etc and harassed me.. We went to my dads house to clarify the issue but my brother asked us to get out and told the whole house was in his name. Again he went back to US. My dad was alone. I too stayed away from him. This 2017 Jan my brother came back from US and saw my dad was immovable. He came to see dad on 13th Jan, without his permission took locker key of banks and took away that house property documents, gold, my fathers central bank FD receipt's . he visited dad now and then and lastly in march told dad that why he is keeping so much of FD in bits and pieces since he was immovable and need someone's help to go for renewal. Got a signature in an empty FD form and later filled his name in it and interest yo go to his wife account. My father WS unaware of these issues. It was 33 lakhs. My dad started asking him to give the receipt since he might loose it. He kept dodging n saying excuses. My father at one point of time shouted at him and he put his number in block list and whenever my dad called him ,only received message busily engaged and no call back or reply for his messages. Meanwhile in July, our tenant who was staying in our house for 20years , since her husband expired, said she is vacating the house. She was giving food and helping him . now my dad got panic called me and apologised and said that he would give the jewels to me and equal share of house and 40 lakhs equal and asked me to take care of him. We agreed and when we carried our dad to banks to operate the locker ,was terribly shocked to see lockers empty and their record said it was operated last on 21 Jan 2017 by Satheesh . Then dad asked about FD, they told its in his name and second shock.we immediately gave a complaint of stop payment of the FD till it's settled. Went to commissioner of police,directed to local police,then to ACP office but in vain. Pls advice.