Can any one claim his elder brother properties.....

my grandfather death in 1958, at the time of his death my elder uncle is 14 year old ,my second uncle is 10 year,my father is 6 years old, my father has three brothers only. after my grand father death my elder uncle is honour of all family from that time . after some years my elder uncle purchase four acre land in villege between 1967-77 from his own name. this all properties bought between 1967-77 in few parts , at the time of purchasing this properties my elder uncle age is 23-33 my second uncle is 15-25years ,my father is 13-23 years (minor),this all land used by my all uncle equally till 1992 with very peacefully .after that suddenly my elder uncle and his sons told it is my land only..... because in document paper my father name only. and they captured all slowly. then may father and second uncle registered a case in court against my elder uncle in 2001 in district court hajipur bihar. my father and my middle uncle told in that properties they have also right....in that properties..... what is the future of this case pls guide me MY ELDER UNCLE BASICALLy FARMER USE all parential land for agriculture. he not done any govt, pvt job. IT is true my elder uncle purchase this all land from hindu undivided family incomes. BUT presently my elder uncle denies thruth.. he said in court he bought all land from his self accuried income. he said false in court . but i have lack of evidence to prove it.... which type of proof help me to win the case ...pls help me