Can I sue my sibling

Hi, I am 43 and a bachelor in Kanpur, UP. In 2003, when my elder brother asked for separation, we had four properties in the family. A plot of land in my father's name, a 3 bhk apartment in my brother's name and a 1 bhk apartment (transferred in my name by father in 2012) all in prime location, as well as a rental shop with agreement in my father's name. My brother staked claim to the rental shop (income, and goodwill on future transfer) and together with the apartment claimed 60 percent of total family net worth to which I acquiesced for the sake of peace, unevenly leaving the plot of land and the small flat for the remaining members -- my parents, my married sister and myself. I left for the US in 12/2005 and in 03/2008 my brother convinced our parents to sell the plot of land (our share) citing losses in business and the property was sold for 68 lacs of which only 20 lacs was received via cheque and shown as sale amount, and I was kept in the dark for months. On my return, I received only 12 lacs from this amount in 2013, as through coercion, manipulation and emotional blackmail my brother managed to expend almost seventy percent of the remaining amount on his family and himself. Then in 2015 the rental shop was transferred back to the owner for a goodwill of 22 lacs in cash without official record. Not a single penny was given to me, and the money once again went to carry the expenses of my sibling and his family, as he claimed no income from his share in past years. We accepted this as well for the sake of the upbringing of our niece and nephew, even though my brother had already unjustly used up our share of the property.(plot of land) Now my brother is selling the most expensive element of family property, the 3 bhk flat in his name, which has a circle rate value of 75 lacs and a market value of more than a crore. He has refused to honor his moral obligation and recompense me for exploiting my rightful share for the last 15 years. The value of the 1 bhk in my name is thirty lacs and along with the 12 lac given to me, I stand to inherit 42 lacs or only twenty percent of total family net worth of 2.1 crores. My query is that do I have a legitimate case against my brother for one-third of value under IPA for this deceit when: 1) Most of the amount received in transactions done in past ten years was in cash and hence without official record and the properties were in my father's name 2) Even though my father has consented to my brother's decisions both past and present, I don't want him to be in any trouble as a result of this case. 3) If I do take my brother to court then how can I prove the actual amounts of past transactions (both cheque and cash) 4) If I ask for IT assessment for past transactions would my father be in any trouble on taxation although the manipulation and coercion were carried by my brother. Kindly advise Thank you