There are two considerations here.  First of all, your brother has violated the terms of his parole by committing a criminal offense.  Secondly, there are the drug charges for which he was just arrested.As to his parole, since this would be considered a major violation it will be treated accordingly.  He will more than likely have his probation revoked, be incarcerated, and have to serve out the rest of his original sentence.  As for the drug possession and transportation charges, without more details I don't know what the penalties will be, but I do know that he will be considered a repeat offender so they will be harsher.  He could be looking at the maximum.  Again without all of the facts of the case it's hard to say.   Obviously, it goes without saying that he will need to get an attorney to represent him on all of this.  He is in serious trouble.