Your brother no get evidence since ur father no change ur position as first son

Call all the neighbours and hear from them by urself

I disagree that the parents caused the problem,what they did is the best,had it been they opened up when they were alive it would have caused more problem and division among themselves

The father left document to set things right only that the brother dont want to accept

The younger brother stand on the fact that he is not his biological brother any other thing his father write on the document is useless so far the neighbours had confirmed hes not his biological brother