Your brother has every right to move an application for anticipatory bail till the time he is not arrested. The rejection of his petition u/s 482 of Cr.P.C., will have no effect on the merits of the petition for anticipatory bail because the parameters for grant of anticipatory bail are different than that of petition under section 482 of Cr.P.C. application for anticipatory bail cannot be rejected merely on the ground that petition under section 482 of Cr.P.C has been rejected.