How will ancestral property be divided amongst children ?

Hi, My grandpa has 2 brother , my grandpa Elder brother died many year ago and after his death all property taken care by her wife.Her wife do not had any child and because elder grandpa who died was in government service so her wife make a affidavit for a relative to adopt him as son so that he can get that government job. Perhaps 2-3 Years ago , few peoples in near town , try for registry all her property. During the registry when registrar asked to her about her property and when she aware about this fraud , she start crying on court in front of registrar. After this event , the relative adopted by her , District registrar and few peoples in village , given a written complain to police that her (elder grandpa wife) mental condition is not good. Perhaps 1 Year ago she died and after that we get to know that she has registry all her property to that relative after few days of above incident.My grandpa is alive and i have copy of that policy case, Please suggest can we do something.